case study questions class 10 magnetic effect of electric current

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Case Study Questions Class 10 Science Magnetic Effects of Electric Current

Case study questions class 10 science chapter 13 magnetic effects of electric current.

CBSE Class 10 Case Study Questions Science Magnetic Effects of Electric Current. Term 2 Important Case Study Questions for Class 10 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Magnetic Effects of Electric Current.

At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.

CBSE Case Study Questions Class 10 Science Magnetic Effects of Electric Current

Case Study – 1

Andre Marie Ampere suggested that a magnet must exert an equal and opposite force on a current carrying conductor, which was experimentally found to be true. But we know that current is due to charges in motion. Thus, it is clear that a charge moving in a magnetic field experience a force, except when it is moving in a direction parallel to it. If the direction of motion is perpendicular to the direction of magnetic field, the magnitude of force experienced depends on the charge, velocity (v) , strength of magnetic field(B), and sine of the angle between v and B.

(a) Direction of magnetic force is given by which rule?

Answer- Fleming’s left hand rule.

(b) Write the statement of the rule?

Answer- It states that if we stretch thumb, forefinger or the index finger and the middle finger in such a way that they are mutually perpendicular to each other then the thumb gives the direction of the motion or the force acting on conductor, index finger gives the direction of magnetic field and the middle finger gives the direction of current.

Case Study – 2

Two coils C1 and C2 are wrapped around a non-conducting cylinder. Coil C1 is connected to a battery and key and C2 with galvanometer G. On pressing the key (K), current starts flowing in the coil C1.

case study questions class 10 magnetic effect of electric current

State your observation in the galvanometer.

(a) When key K is pressed on.
(b) When current in the coil C1 is switched off.
(c) When the current is passed continuously through coil C1 .
(d) Name and state the phenomenon responsible for the above observation.

a.) The galvanometer needle deflects momentarily in one direction.

b.) The galvanometer needle deflects again momentarily but in opposite direction to that in the previous case.

c.) No deflection.

d) Electromagnetic induction.

Explanation- Electromagnetic induction is a process by changing a magnetic field in a conductor, which induces a current in another conductor placed in nearby.

Case Study – 3

It is well known that “magnetic field is caused by electric current. ”Whenever there is a change in magnetic flux linked with a coil (or circuit) an emf is induced in the coil. This phenomenon is called electromagnetic induction. The emf produced in the coil is called the induced emf.If the coil is closed, the current thus produced is called as induced current. The direction of induced current is determining by Fleming’s right hand rule. These induced current are used in a moving coil microphone, tape-recorders, video recorders, hard-discs in computers etc.

Based on the above information, answer the following questions

(a) State Faraday’s law of electromagnetic induction.

Ans – When we linked magnetic field lines with a coil due to relative motion of a magent and the coil, then an induced current produced in the coil. The magnet of induced current is directly proportional. The rate of change of number of magnetic field lines to the coil.

(b) State any two methods of inducing current in a coil.

Answer- Current can be induced in a coil by

Rotating a coil within a magnetic field.
Moving a coil towards or away from a magnet
Moving a magnet towards or away from the coil

Case Study – 4

A student connects a coil of wire with a sensitive galvanometer as shown in figure. Where should the bar magnet be placed to cause the deflection in the galvanometer.

Answer- The bar magnet should be moved towards or away from the coil and parallel to the axis of the coil.

Case study: 4

As the magnitude of magnetic field depends on the current through it. Also, if the number of turns of wire in a circuit is more then also the magnitude of magnetic field is more. If a coil having many circular turns of insulated copper wire wound closely to form a cylindrical shape is called as solenoid. Solenoid is used to produce strong magnetic field which can be used to magnetise the piece of magnetic material. And hence they are used in making electromagnet mainly.

1) What is the nature of magnetic field lines inside the solenoid?

2) For what right hand thumb rule is used?

3) What are the properties of magnetic poles?

1) Inside the solenoid the magnetic field lines are parallel straight lines and the magnetic field inside the solenoid is uniform.

2) The right hand thumb rule is used to find the direction of electric current which given by the thumb.

3) The like poles of a magnet repels each other and the unlike poles of magnet attract each other.

Case study: 5

Electric motor is used to convert electric energy into mechanical energy. It is mostly used in electric fans, refrigerators, mixers, washing machine, computers etc.

The commercial motor uses an electromagnet in place of permanent magnet, large number of turns of the conducting wire in the current carrying coil, a soft iron core on which the coil is wound. If we stretched the thumb, forefinger and middle finger of right hand so that they are mutually perpendicular to each other. If the forefinger gives the direction of magnetic field and thumb gives the direction of motion of conductor then the middle finger gives the direction of induced current. And this rule is called as Fleming’s right hand rule.

Electric generator is used to convert mechanical energy into electrical energy.The direct current always flows in one direction while the alternating current changes its direction periodically. The frequency of AC in India is 50 Hz.

1) Which is the important advantage of AC over DC?

2) Electric generator works on the phenomenon of?

3) Fleming’s right hand rule is used for ?

4) The phenomenon of electromagnetic induction was discovered by?

1) The important advantage of AC over DC is that electric power can be transmitted over long distances without more loss of energy.

2) Electric generator is based on the phenomenon of electromagnetic induction.

3) Fleming’s right hand rule is used to find the direction of induced current.

4) The phenomenon of electromagnetic induction was discovered by Michael Faraday.

Case study: 6

The domestic electric circuit consist of red insulated cover called as live wire, wire with black insulation called as neutral wire and the wire with green insulation is called as Earth wire. We know that fuse is connected in series with the circuit to prevent the damaging of electrical appliances and circuit from overloading. Overloading occurs when live wire and the neutral wire comes in direct contact with each other. Because of which current through the circuit increases suddenly. Also, overloading may occurs because of connecting many appliances to a single socket. The Earth wire which is green in colour is connected to a metal plate deep in the earth near the house. This type of safety measure is used in appliances like electric press, toaster, table fan, refrigerator etc. The Earth wire is gives low resistance conducting path for the electric current. In this way it protects us from severe electric shock.

All the appliances are connected in parallel circuit so that the potential difference across each appliance will be same.

1) What are the signs of live wire and neutral wire?

2) In our country what is the potential difference between live wire and neutral wire?

3) What is short circuiting?

4) What is the main purpose of using fuse in electric circuit?

1) The red insulated wire is the live wire or positive and the black insulated wire is the neutral wire or negative.

2) In our country the potential difference between live wire and neutral wire is 220 V.

3) When live wire and neutral wire comes in direct contact, in that situation the current through the circuit increases suddenly and it is called as short circuiting.

4) Because of Joule’s heating effect the heat produced causes the fuse to melt and to break the circuit. And thereby protect the circuit and electric appliances.

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Case Study Chapter 13 Magnetic Effect of Electric Current

Please refer to Chapter 13 Magnetic Effect Of Electric Current Case Study Questions with answers provided below. We have provided Case Study Questions for Class 10 Science for all chapters as per CBSE, NCERT and KVS examination guidelines. These case based questions are expected to come in your exams this year. Please practise these case study based Class 10 Science Questions and answers to get more marks in examinations.

Case Study Questions Chapter 13 Magnetic Effect Of Electric Current

Case/Passage – 1 A solenoid is a long helical coil of wire through which a current is run in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the solenoid and close to zero outside and is similar to the field of a bar magnet having a north pole at one end and a south pole at the other depending upon the direction of current flow. The magnetic field produced in the solenoid is dependent on a few factors such as, the current in the coil, number of turns per unit length etc. The following graph is obtained by a researcher while doing an experiment to see the variation of the magnetic fieldwith respect to the current in the solenoid. The unit of magnetic field as given in the graph attached is in milli-Tesla (mT) and the current is given in Ampere.

Case Study Chapter 13 Magnetic Effect of Electric Current

Question: What will happen if a soft iron bar is placed inside the solenoid? (a) The bar will be electrocuted resulting in shortcircuit. (b) The bar will be magnetised as long as there is current in the circuit. (c) The bar will be magnetised permanently. (d) The bar will not be affected by any means.

Question: From the graph deduce which of the following statements is correct. (a) For a current of 0.8A the magnetic field is 13 mT (b) For larger currents, the magnetic field increases nonlinearly. (c) For a current of 0.8A the magnetic field is 1.3 mT (d) There is not enough information to find the magnetic field corresponding to 0.8A current.

Question: The magnetic field lines produced inside the solenoid are similar to that of … (a) a bar magnet 10 (b) a straight current carrying conductor (c) a circular current carrying loop (d) electromagnet of any shape

Question: What type of energy conversion is observed in a linear solenoid? (a) Mechanical to Magnetic (b) Electrical to Magnetic (c) Electrical to Mechanical (d) Magnetic to Mechanical

Question: After analysing the graph a student writes the following statements. I. The magnetic field produced by the solenoid is inversely proportional to the current. II. The magnetic field produced by the solenoid is directly proportional to the current. III. The magnetic field produced by the solenoid is directly proportional to square of the current. IV. The magnetic field produced by the solenoid is independent of the current. Choose from the following which of the following would be the correct statement(s). (a) Only IV (b) I and III and IV (c) I and II (d) Only II

Case/Passage – 2 For a conductor of length L carrying a current of I in a field B the force experienced by the conductor F → = I L → x → B If the current-carrying conductor in the form of a loop of any arbitrary shape is placed in a uniform field, then, F → =0 i.e., the net magnetic force on a current loop in a uniform magnetic field is always zero. Here it must be kept in mind that in this situation different parts of the loop may experience elemental force due to which the loop may be under tension or may experience a torque. Direction of force can be determined by fleming’s left hand rule, right hand palm rule or screw rule.

Question: An electron moving with uniform velocity in x-direction enters a region of uniform magnetic field along y-direction. Which of the following physical quantity(ies) is (are) non-zero and remain constant?

I. Velocity of the electron II. Magnitude of the momentum of the electron. III. Force on the electron. IV. The kinetic energy of electron. (a) Only I andII. (b) Only III and IV. (c) All four (d) Only II and IV.

Question: A wire is lying horizontally in the north-south direction and there is a horizontal magnetic field pointing towards and the east. Some positive charges in the wire move north and an equal number of negative charges move south. The direction of force on the wire will be

(a) east (b) down, into the page (c) up, out of the page (d) west

Question: Which of the following can produce a magnetic field? (a) Electric charges at rest (b) Electric charges in motion (c) Only by permanent magnets (d) Electric charges whether at rest or in motion

Question: The direction of induced current is obtained by (a) Fleming’s left hand rule (b) Maxwell’s cork-screw rule (c) Ampere’s rule (d) Fleming’s right hand rule

Question: Four situations are given below- I. An infinitely long wire carrying current II. A rectangular loop carrying current III. A solenoid of finite length carrying current IV. A circular loop carrying current. In which of the above cases will the magnetic field produced be like that of a bar magnet? (a) I (b) I and III (c) Only III (d) Only IV

Case/Passage – 3

The strength of the magnetic field produced by a currentcarrying circular coil (or circular wire) depends on (i) Current flowing through the coil. (ii) Radius of the circular coil. (iii) Number of turns of wire in the circular coil.

Question: What type of curve we get, between magnetic field and distance along the axis of a current carrying circular coil? (a) Straight (b) Circular (c) Parabolic (d) None of these

Question:A long horizontal power line is carrying a current of 100 A in the east-west direction. The direction of magnetic field at a point 1.0 m below it is (a) south to north (b) north to south (c) east to west (d) west to east

Question: If a current carrying straight conductor is placed is east-west direction, then the direction of the force experienced by the conductor due to earth’s magnetic field is: (a) downward (b) upward (c) east-west (d) west east

Case/Passage – 4

Study this table related to wattage of home appliances and answer the questions that follow.

Question. Which of the following will to consume least power? (a) Laptop (b) Desktop (c) Printer (d) Blender

Question. Many appliance works on the principle of electromagnetic induction. The role which depicts the direction of induced current is as (a) Faraday’s rule (b) Henery’s rule (c) Fleming’s rule (d) Maxwell’s rule

Question. Which of the following home applicance is not based on magnetic effect of current? (a) Ceiling fan (b) Blender (c) Geyser (d) Washing Machine

Question. Which of the following will consume maximum power? (a) Fridge (b) Iron (c) Air conditioner (d) Coffee maker

Question. Which of the following lighting device is best to use in terms of power consumption? (a) Bulb (b) CFL (c) Tube light (d) LED

Case/Passage – 5

A magnetic stripe card, also referred to as a swipe card or magstripe, is a plastic card with a magnetic strip attached on its surface. This stripe is made of tiny iron-based components whose magnetism can be modified and can therefore be used to store information. A magstripe is quite similar to a magnetic recording tape, which you might find in videotape or a music cassette. The magnetic strip on a card can be ‘written’ or encoded with information because the tiny iron-based particles that make up the strip can be magnetised in different directions by a device that produces a strong magnetic field. This device is a ‘solenoid’, which is basically a coil wound into a tightly packed helix. The wire is wound around a highpermeable, metallic core that produces a strong magnetic field when a current is passed through it. This device encodes the required information onto the stripe, which is then pasted on a plastic card. When a card with a magnetic strip is moved back and forth over the ‘reader head’ , a voltage is induced in the coils of the card reader device. A card reader consists of solenoid too – the same component that is used to write information in the magnetic strip. This voltage can be amplified and recorded electronically, which is finally read by a computer (or a processor installed within the reader) to authenticate a user (in the case of identity cards) or a transaction (in the case of credit/debit cards).

Question. The force on a wire inside a magnetic field increase when (a) The current is increased (b) Strength of magnetic field increases (c) Length of wire is increased (d) All of above

Question. The factors on which one magnetic field strength produced by current carrying solenoids depends are (a) Magnitude of current (b) Number of turns (c) Heat produced (d) Both (a) and (b)

Question. Which of the following are the devices that uses magnetic theory to record data (a) The hotel key cards (b) Audio tapes (c) CD’s (d) All of the above

Question. The information of users which are read by the ATM machines are stored on (a) Magnetic box on card (b) Magnetic strip on card (c) Inside ATM machine (d) None of above

Question. Name the scientist who gave the principle of electromagnetic field (a) Oersted (b) Faraday (c) Bohr (d) Ampere

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Case Study Questions Class 10 Science Chapter 13 Magnetic Effects of Electric Current

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Case study Questions Class 10 Science Chapter 13 are very important to solve for your exam. Class 10 Science Chapter 13 Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current

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In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason . There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Magnetic Effects of Electric Current Case Study Questions With answers

Here, we have provided case-based/passage-based questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current

Case Study/Passage Based Questions

Question 1:

An electric motor is a rotating device that converts electrical energy into mechanical energy electric motors are used as an important component in electric fans, refrigerators, mixer, washing machines, computers, MP3 players etc. Motor Works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it, a force acts on the coil which rotates it continuously. When the coil rotates the shaft attached to it also rotates. In this way the electrical energy supplied to the motor is converted into the mechanical energy of rotation.

1.1) When the current is switched on, an electric fan converts : (a) electrical energy into mechanical energy (b) chemical energy into mechanical energy (c) electrical energy into mechanical energy (d) mechanical energy into electrical energy

Answer: (c) electrical energy into mechanical energy

1.2) In an electric motor, the direction of current in the coil changes once in each (a) two rotations (b) one rotation (c) half rotation (d) one-fourth rotation

Answer: (c) half rotation

1.3) An electron beam enters a magnetic field at right angles to it. The direction of force acting on the electron beam will be : (a) to the right (b) to the left (c) into the page (d) out of the page

Answer: (c) into the page

1.4) A magnetic field exerts no force on : (a) an unmagnetised iron bar (b) a stationary electric charge (c) a magnet (d) an electric charge moving perpendicular to its direction

Answer: (b) a stationary electric charge

1.5) Which of the following has no effect on the size of the turning effect on the coil of an electric motor? (a) The amount of the current in the coil. (b) The number of turns in the coil. (c) The direction of the current in the coil. (d) The strength of the magnetic field.

Answer: (c) The direction of the current in the coil

Question 2:

An insulated copper wire wound on a cylindrical cardboard tube such that its length is greater than its diameter is called a solenoid. When an electric current is passed through the solenoid, it produces a magnetic field around it. The magnetic field produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet. The field lines inside the solenoid are in the form of parallel straight lines. The strong magnetic field produced inside a current-carrying solenoid can be used to magnetize a piece of a magnetic material like soft iron when placed inside the solenoid. The strength of the magnetic field produced by a current-carrying solenoid is directly proportional to the number of turns and strength of the current in the solenoid.

(i) The strength of magnetic field inside a long current-carrying straight solenoid is (a) more at the ends than at the centre (b) minimum in the middle (c) same at all points (d) found to increase from one end to the other.

Answer: (c) same at all points

(ii) The north-south polarities of an electromagnet can be found easily by using

Answer: (c) Clock face rule

(iii) For a current in a long straight solenoid N-and S-poles are created at the two ends. Among the following statements, the incorrect statement is (a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid. (b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil. (c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet. (d) The N- and S-poles exchange position when the direction of current through the solenoid is reversed.

Answer: (c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.

(iv) A long solenoid carrying a current produces a magnetic field B along its axis. If the current is double and the number of turns per cm is halved, then new value of magnetic field is

Answer: (a) B

Answer: (a) N-pole

Question 3:

(i) Choose incorrect statement from the following regarding split rings. (a) Split rings are used to reverse the direction of current in coil. (b) Split rings are also known as commutator. (c) Split ring ii a discontinuous or a broken ring. (d) Both (a) and (b)

Answer: (d) Both (a) and (b)

(ii) Which of the following has no effect on the size of the turning effect on the coil of an electric motor?

Answer: (b) The direction of the current in the coil.

(iii) When current is switched ON, an electric fan converts

Answer: (b) electrical energy to mechanical energy

(iv) In an electric motor, device that makes contact with the rotating rings and through them to supply current to coil is

Answer:(b) brushes

(v) In an electric motor, the direction of current in the coil changes once in each

Answer:(c) half rotation

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Class 10 Science Chapter 12 Case Based Questions - Magnetic Effects of Electric Current

Case study - 1.

Q1: What are the signs of live wire and neutral wire? Ans: The red insulated wire is the live wire or positive and the black insulated wire is the neutral wire or negative. Q2: In our country what is the potential difference between live wire and neutral wire? Ans: In our country the potential difference between live wire and neutral wire is 220 V. Q3: What is short circuiting? Ans: When live wire and neutral wire comes in direct contact, in that situation the current through the circuit increases suddenly and it is called as short circuiting. Q4: What is the main purpose of using fuse in electric circuit? Ans: Because of Joule’s heating effect the heat produced causes the fuse to melt and to break the circuit. And thereby protect the circuit and electric appliances.

Case study - 2

If we stretched the thumb, forefinger and middle finger of our left hand so that they are mutually perpendicular to each other. If the forefinger gives the direction of magnetic field and middle finger gives the direction of electric current then the thumb gives the direction of motion or the force acting on the conductor. Electric motor is used to convert electric energy into mechanical energy. It is mostly used in electric fans, refrigerators, mixers, washing machine, computers etc. The commercial motor uses an electromagnet in place of permanent magnet, large number of turns of the conducting wire in the current carrying coil, a soft iron core on which the coil is wound. If we stretched the thumb, forefinger and middle finger of right hand so that they are mutually perpendicular to each other. If the forefinger gives the direction of magnetic field and thumb gives the direction of motion of conductor then the middle finger gives the direction of induced current. And this rule is called as Fleming’s right hand rule. Electric generator is used to convert mechanical energy into electrical energy.The direct current always flows in one direction while the alternating current changes its direction periodically. The frequency of AC in India is 50 Hz.

Q1: Which is the important advantage of AC over DC? Ans: The important advantage of AC over DC is that electric power can be transmitted over long distances without more loss of energy.

Q2: Electric generator works on the phenomenon of? Ans: Electric generator is based on the phenomenon of electromagnetic induction. Q3: Fleming’s right hand rule is used for? Ans: Fleming’s right hand rule is used to find the direction of induced current. Q4: The phenomenon of electromagnetic induction was discovered by? Ans: The phenomenon of electromagnetic induction was discovered by Michael Faraday.

Case study - 3

The change in electric current through the circuit produces magnetic field around it. Magnetic field is a vector quantity which has both magnitude as well as direction. The magnetic field lines produced are directed from north pole and ends at south pole. These lines are closed curves from which strength of the magnetic field is determined. Where magnetic field lines are crowded magnetic field is stronger and where very apart the strength of magnetic field is weak. So, we can say that as the current through the electrical circuit increase then the magnitude of magnetic field also increases. If a current carrying conductor is holded in right hand by curling figures around it. Then, the curled figures gives the direction of electric current and curled figures gives the direction of magnetic field. As the magnitude of magnetic field depends on the current through it. Also, if the number of turns of wire in a circuit is more then also the magnitude of magnetic field is more. If a coil having many circular turns of insulated copper wire wound closely to form a cylindrical shape is called as solenoid. Solenoid is used to produce strong magnetic field which can be used to magnetise the piece of magnetic material. And hence they are used in making electromagnet mainly.

Q1: What is the nature of magnetic field lines inside the solenoid? Ans: Inside the solenoid the magnetic field lines are parallel straight lines and the magnetic field inside the solenoid is uniform. Q2: For what right hand thumb rule is used? Ans: The right hand thumb rule is used to find the direction of electric current which given by the thumb. Q3: What are the properties of magnetic poles? Ans: The like poles of a magnet repels each other and the unlike poles of magnet attract each other.

Case Study – 4

It is well known that “magnetic field is caused by electric current. ”Whenever there is a change in magnetic flux linked with a coil (or circuit) an emf is induced in the coil. This phenomenon is called electromagnetic induction. The emf produced in the coil is called the induced emf. If the coil is closed, the current thus produced is called as induced current. The direction of induced current is determining by Fleming’s right hand rule. These induced current are used in a moving coil microphone, tape-recorders, video recorders, hard-discs in computers etc.

Based on the above information, answer the following questions Q1: State Faraday’s law of electromagnetic induction. Ans: When we linked magnetic field lines with a coil due to relative motion of a magent and the coil, then an induced current produced in the coil. The magnet of induced current is directly proportional. The rate of change of number of magnetic field lines to the coil. Q2: State any two methods of inducing current in a coil. Ans: Current can be induced in a coil by

Rotating a coil within a magnetic field.
Moving a coil towards or away from a magnet
Moving a magnet towards or away from the coil

Case Study – 5

Q1: Direction of magnetic force is given by which rule? Ans: Fleming’s left hand rule. Q2: Write the statement of the rule? Ans: It states that if we stretch thumb, forefinger or the index finger and the middle finger in such a way that they are mutually perpendicular to each other then the thumb gives the direction of the motion or the force acting on conductor, index finger gives the direction of magnetic field and the middle finger gives the direction of current.

Case Study – 6

Two coils C1 and C2 are wrapped around a non-conducting cylinder. Coil C1 is connected to a battery and key and C2 with galvanometer G. On pressing the key (K), current starts flowing in the coil C1.

Class 10 Science Chapter 12 Case Based Questions - Magnetic Effects of Electric Current

State your observation in the galvanometer. Q1: When key K is pressed on. Ans: The galvanometer needle deflects momentarily in one direction.

Q2: When current in the coil C1 is switched off. Ans: The galvanometer needle deflects again momentarily but in opposite direction to that in the previous case.

Q3: When the current is passed continuously through coil C1. Ans: No deflection.

(d) Name and state the phenomenon responsible for the above observation. Ans: Electromagnetic induction. Explanation: Electromagnetic induction is a process by changing a magnetic field in a conductor, which induces a current in another conductor placed in nearby.

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Magnetic Effects of Electric Current Case Study Based Questions Class 10

Students who are studying in CBSE class 10 board, need to get the knowledge about the Magnetic Effects of Electric Current Case Study Based Questions. Case based questions are generally based on the seen passages from the chapter Magnetic Effects of Electric Current. Through solving the case based questions, students can understand each and every concept.

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Magnetic Effects of Electric Current Case Study Based Questions with Solutions

Selfstudys provides case studies for the Class 10 Science chapter Magnetic Effects of Electric Current with solutions. The Solutions can be helpful for students to refer to if there is a doubt in any of the case studies problems. The solutions from the Selfstudys website are easily accessible and free of cost to download. This accessibility can help students to download case studies from anywhere with the help of the Internet.

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These case based questions start with short or long passages. In these passages some concepts included in the chapter can be explained.
After reading the passage, students need to answer the given questions. These questions are asked in the Multiple Choice Questions (MCQ).
These case based questions are a type of open book test. These case based questions can help students to score well in the particular subject.
These Magnetic Effects of Electric Current Case Study Based Questions can also be asked in the form of CBSE Assertion and Reason .

Benefits of Solving Magnetic Effects of Electric Current Case Study Based Questions

According to the CBSE board, some part of the questions are asked in the board exam question papers according to the case studies. As some benefits of solving Magnetic Effects of Electric Current Case Study Based Questions can be obtained by the students. Those benefits are:

Through solving case studies students will be able to understand every concept included in the chapter Magnetic Effects of Electric Current
Passages included in the case study are seen passages, so students don’t need to struggle for getting answers. As these questions and answers can be discussed by their concerned teacher.
Through these students can develop their observation skills. This skill can help students to study further concepts clearly.
Case studies covers all the concepts which are included in the Magnetic Effects of Electric Current

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Tips to solve Magnetic Effects of Electric Current Case Study Questions-

Students should follow some basic tips to solve Magnetic Effects of Electric Current Case Study Based Questions. These tips can help students to score good marks in CBSE Class 10 Science.

Generally, the case based questions are in the form of Multiple Choice Questions (MCQs).
Students should start solving the case based questions through reading the given passage.
Identify the questions and give the answers according to the case given.
Read the passage again, so that you can easily answer the complex questions.
Answer according to the options given below the questions provided in the Magnetic Effects of Electric Current Case Study Based Questions.

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Class 10 Science: Case Study Chapter 13 Magnetic Effects of Electric Current PDF Download

Here we are providing you with Class 10 Science Chapter 13 Magnetic Effects of Electric Current Case Study Questions, by practicing these Case Study and Passage Based Questions will help you in your Class 10th Board Exam.

Case Study Chapter 12 Magnetic Effects of Electric Current

Here, we have provided case-based/passage-based questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current

Case Study/Passage Based Questions

Question 1:

Answer: (c) electrical energy into mechanical energy

1.2) In an electric motor, the direction of current in the coil changes once in each (a) two rotations (b) one rotation (c) half rotation (d) one-fourth rotation

Answer: (c) half rotation

Answer: (c) into the page

1.4) A magnetic field exerts no force on : (a) an unmagnetised iron bar (b) a stationary electric charge (c) a magnet (d) an electric charge moving perpendicular to its direction

Answer: (b) a stationary electric charge

Answer: (c) The direction of the current in the coil

Question 2:

Answer: (c) same at all points

(ii) The north-south polarities of an electromagnet can be found easily by using

Answer: (c) Clock face rule

Answer: (c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.

(iv) A long solenoid carrying a current produces a magnetic field B along its axis. If the current is double and the number of turns per cm is halved, then new value of magnetic field is

Answer: (a) B

Answer: (a) N-pole

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Class 10th Science - Magnetic Effects of Electric Current Case Study Questions and Answers 2022 - 2023

Class 10th Science - Magnetic Effects of Electric Current Case Study Questions and Answers 2022 - 2023 Study Materials Sep-09 , 2022

QB365 provides a detailed and simple solution for every Possible Case Study Questions in Class 10 Science Subject - Magnetic Effects of Electric Current, CBSE. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

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Magnetic effects of electric current case study questions with answer key.

Final Semester - June 2015

An insulated copper wire wound on a cylindrical cardboard tube such that its length is greater than its diameter is called a solenoid. When an electric current is passed through the solenoid, it produces a magnetic field around it. The magnetic field produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet. The field lines inside the solenoid are in the form of parallel straight lines. The strong magnetic field produced inside a current-carrying solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the solenoid. The strength of magnetic field produced by a current carrying solenoid is directly proportional to the number of turns and strength of current in the solenoid. (i) The strength of magnetic field inside a long current -carrying straight solenoid is (a) more at the ends than at the centre (b) minimum in the middle (c) same at all points (d) found to increase from one end to the other. (ii) The north-south polarities of an electromagnet can be found easily by using

(ii) If a charged particle is moving along a magnetic field line. The magnetic force on the particle is

(iii) When current is switched ON, an electric fan converts

(iv) In an electric motor, device that makes contact with the rotating rings and through them to supply current to coil is

(v) In an electric motor, the direction of current in the coil changes once in each

(ii) What will happen if a soft iron bar is placed inside the solenoid? (a) The bar will be electrocuted resulting in short-circuit. (b) The bar will be magnetised as long as there is current in the circuit. (c) The bar will be magnetised permanently. (d) The bar will not be affected by any means. (iii) The magnetic field lines produced inside the solenoid are similar to that of … (a) a bar magnet (b) a straight current carrying conductor (c) a circular current carrying loop (d) electromagnet of any shape (iv) After analysing the graph a student writes the following statements. I. The magnetic field produced by the solenoid is inversely proportional to the current. II. The magnetic field produced by the solenoid is directly proportional to the current. III. The magnetic field produced by the solenoid is directly proportional to square of the current. IV. The magnetic field produced by the solenoid is independent of the current. Choose from the following which of the following would be the correct statement(s).

(iii) The magnetic effect of current was discovered by :

(iv) The magnetic field inside a long straight solenoid carrying current :

(v) If the direction of electric current in a solenoid when viewed from a particular end is anticlockwise, then this end of solenoid will be :

(iv) A plotting compass is placed near the south pole of a bar magnet. The pointer of plotting compass will : (a) point away from the south pole (b) point parallel to the south pole (c) point towards the south pole (d) point at right angles to the south pole (v) Which of the following statements is incorrect regarding magnetic field lines ? (a) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points. (b) Magnetic field lines are closed curves (c) If magnetic field lines are parallel and equidistant, they represent zero field strength (d) Relative strength of magnetic field is shown by the degree of closeness of the field lines

(iv) According to right-hand thumb rule direction of the curl of fingers of the right hand gives the

(v) In case of circular loop carrying current, the strength of magnetic field is (a) constant everywhere (b) stronger inside the loop than outside the loop (c) weaker inside the loop than outside the loop (d) none of these

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Important Questions

Magnetic Effects of Electric Current

Ncert revision notes for chapter 13 magnetic effects of electric current class 10 science.

→ Magnet is any substance that attracts iron or iron-like substances.

→ An electric current-carrying wire behaves like a magnet.

→ Electromagnets and electric motors involve the magnetic effect of electric current, and electric generators involve the electric effect of moving magnets.

→ Compass needle get deflected on passing an electric current through a metallic conductor.

(i) Every magnet has two poles i.e. North and South.

(ii) Like poles repel each other.

(iii) Unlike poles attract each other.

(iv) A freely suspended bar magnet aligns itself in nearly north-south direction, with its north pole towards north direction.

Characteristics of Field Lines

→ Field lines arise from North pole and end into South pole of the magnet.

→ Field lines are closed curves.

→ Field lines are closer in stronger magnetic field.

→ Field lines never intersect each other as for two lines to intersect, there must be two north directions at a point, which is not possible.

→ Direction of field lines inside a magnet is from South to North.

→ The relative strength of magnetic field is shown by degree of closeness of field

Magnetic Field of a Bar Magnet

→ H. C. Oersted was the first person to state that electric current has magnetic field.

→ Imagine you are holding a current carrying straight conductor in your right hand such

that the thumb is pointing towards the direction of current.

→ Then the fingers wrapped around the conductor give the direction of magnetic field.

→ It can be represented by concentric circles at every point on conductor.

→ Direction can be given by right hand thumb rule or compass.

→ Circles are closer near the conductor.

→ Magnetic field ∝ Strength of current.

→ Magnetic field ∝ 1/Distance from conductor

→ It can be represented by concentric circle at every point.

→ Circles become larger and larger as we move away.

→ Every point on wire carrying current would give rise to magnetic field appearing as straight line at center of the loop.

→ The direction of magnetic field inside the loop is same.

Factors affecting magnetic field of a circular current carrying conductor

→ Magnetic field ∝ Current passing through the conductor

→ Magnetic ∝ 1/Distance from conductor

→ Magnetic field ∝ No. of turns in the coil

→ Magnetic field is additive in nature i.e., magnetic field of one loop adds up to magnetic field of another loop. This is because the current in each circular turn has some direction.

→ A coil of many circular turns of insulated copper wire wrapped closely in a cylindrical form.

→ Magnetic field of a solenoid is similar to that of a bar magnet.

→ Magnetic field is uniform inside the solenoid and represented by parallel field lines.

Direction of magnetic field

(i) Outside the solenoid: North to South

(ii) Inside the solenoid: South to North

→ Solenoid can be used to magnetise a magnetic material like soft iron.

→ It is a temporary magnet, so, can be easily demagnetised.

→ Strength can be varied.

→ Polarity can be reversed.

→ Generally strong magnet.

→ Cannot be easily demagnetised.

→ Strength is fixed.

→ Polarity cannot be reversed.

→ Generally weak magnet.

Andre Marie Ampere suggested that the magnet also exerts an equal and opposite force

on a current carrying conductor.

→ The displacement in the conductor is the maximum when the direction of current is at right angle to the direction of magnetic field.

→ Direction of force is reversed on reversing the direction of current.

→ Stretch the thumb, fore finger and middle finger of your left hand such that they are mutually perpendicular.

→ If fore finger points in the direction of magnetic field, middle finger in the direction of current then thumb will point in the direction of motion or force.

→ Heart and brain in the human body have significant magnetic field.

• MRI (Magnetic Resonance Imaging): Image of internal organs of body can be obtained using magnetic field of the organ.

• Galvanometer: Instrument that can detect the presence of current in a circuit. It also detects the direction of current.

→ An electric motor is a rotating device that converts electrical energy to mechanical energy.

→ An electric motor consists of a rectangular coil ABCD of insulated copper wire. The coil is placed between the two poles of a magnetic field such that the arm AB and CD are perpendicular to the direction of the magnetic field.

→ The ends of the coil are connected to the two halves P and Q of a split ring. The inner sides of these halves are insulated and attached to an axle.

→ The external conducting edges of P and Q touch two conducting stationary brushes X and Y, respectively.

→ Current in the coil ABCD enters from the source battery through conducting brush X and flows back to the battery through brush Y.

→ The force acting on arm AB pushes it downwards while the force acting on arm CD pushes it upwards.

→ Thus the coil and the axle O, mounted free to turn about an axis, rotate anti-clockwise.

→ At half rotation, Q makes contact with the brush X and P with brush Y. Therefore the current in the coil gets reversed and flows along the path DCBA.

→ The split ring acts as a commutator which reverse the direction of current and also reverses the direction of force acting on the two arms AB and CD.

→ Thus the arm AB of the coil that was earlier pushed down is now pushed up and the arm CD previously pushed up is now pushed down.

→ Therefore the coil and the axle rotate half a turn more in the same direction. The reversing of the current is repeated at each half rotation, giving rise to a continuous rotation of the coil and to the axle.

• Commutator: A device that reverses the direction of flow of current through a circuit is called a commutator.

• Armature: The soft iron core, on which the coil is wound including the coils is called armature. It enhances the power of the motor.

Commercial use of motors

(i) an electromagnet in place of permanent magnet

(ii) large number of turns of the conducting wire in the current-carrying coil

(iii) a soft iron core on which the coil is wound.

→ When a conductor is placed in a changing magnetic field, some current is induced in it.

→ Such current is called induced current and the phenomenon is called electromagnetic induction.

Activity No. 1

(i) Magnet moved into the coil: Momentary deflection in G indicating presence of current.

(ii) Magnet kept stationary inside the coil: No deflection.

(iii) Magnet is withdrawn: Momentary deflection in G but in opposite direction of first case.

Activity No. 2

(i) Switched on: Momentary deflection in G.

(ii) Steady current: No deflection.

(iii) Switched off: Momentary deflection in G but in opposite direction of the first case.

→ Hold the thumb, the fore finger and the middle finger of right hand at right angles to each other.

→ If the fore finger is in the direction of magnetic field and the thumb points in the direction of motion of conductor, then the direction of induced current is indicated by middle finger.

• Working principle of electric generator.

• Used to find direction of induced current.

→ An electric generator, mechanical energy is used to rotate a conductor in a magnetic field to produce electricity.

→ An electric generator consists of a rotating rectangular coil ABCD placed between the two poles of a permanent magnet.

→ The two ends of this coil are connected to the two rings R 1 and R 2 . The inner side of these rings are made insulated.

→ The inner side of these rings are made insulated. The two conducting stationary brushes B 1 and B 2 are kept pressed separately on the rings R 1 and R 2 , respectively.

→ The two rings R 1 and R 2 are internally attached to an axle. The axle may be mechanically rotated from outside to rotate the coil inside the magnetic field.

→ Outer ends of the two brushes are connected to the galvanometer to show the flow of current in the given external circuit.

→ When the axle attached to the two rings is rotated such that the arm AB moves up (and the arm CD moves down) in the magnetic field produced by the permanent magnet.

→ After half a rotation, arm CD starts moving up and AB moving down. As a result, the directions of the induced currents in both the arms change, giving rise to the net induced current in the direction DCBA.

→ The current in the external circuit now flows from B 1 to B 2 . Thus after every half rotation the polarity of the current in the respective arms changes.

• To get a direct current (DC) , a split-ring type commutator must be used. With this arrangement, one brush is at all times in contact with the arm moving up in the field, while the other is in contact with the arm moving down.

• The direct current always flows in one direction, whereas the alternating current reverses its direction periodically.

→ The current which reverses its direction periodically.

→ In India, A. C. reverses its direction in every 1/100 second.

Time period = 1/100 + 1/100 = 1/50 s

Frequency = 1/time period = 1/50 = 50 Hz

Advantage of A.C.

→ A. C. can be transmitted over long distance without much loss of energy.

Disadvantage of A.C.

→ A. C. cannot be stored.

→ The current which does not reverse its direction.

→ D. C. can be stored.

→ Loss of energy during transmission over long distance is high.

→ Sources of D. C.: Cell, Battery, Storage cells.

→ There are three kinds of wires used:

(i) Live wire (positive) with red insulation cover.

(ii) Neutral wire (negative) with black insulation cover.

(iii) Earth wire with green insulation cover.

→ The potential difference between live and neutral wire in India is 220 V.

→ Pole ⇒ Main supply ⇒ Fuse ⇒ Electricity meter ⇒ Distribution box ⇒ To separate circuits

• Earth Wire: Protects us from electric shock in case of leakage of current especially in metallic body appliances. It provides a low resistance path for current in case of leakage of current.

• Short Circuit: When live wire comes in direct contact with neutral wire accidentally. The resistance of circuit becomes low which can result in overloading.

• Overloading: When current drawn is more than current carrying capacity of a conductor, it results in overloading.

Causes of overloading

(i) Accidental hike in voltage supply.

(ii) Use of more than one appliance in a single socket.

Safety devices

(i) Electric fuse

(ii) Earth wire

(iii) MCB (Miniature Circuit Breaker)

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Extra Questions for Class 10 Science Chapter 13 Magnetic Effect of Electric Current

Get extra questions for Class 10 Science Chapter 13 Magnetic Effect of Electric Current with PDF. Our subject expert prepared these solutions as per the latest NCERT textbook. These extra questions will be helpful to revise the important topics and concepts. You can easily download all the questions and answers in PDF format from our app.

Magnetic Effect of Electric Current Class 10 Science Extra Questions with Answers

Question 1: Name the type of current: (a) used in household supply. (b) given by a cell.

Answer: (a) Alternating current. (b) Direct current.

Question 2: State the direction of magnetic field in the following case.

Class 10 Chapter 13 Magnetic Effects of Electric Currents Extra Questions 1

Question 3: Name the physical quantities which are indicated by the direction of thumb and forefinger in the Fleming’s right hand rule?

Answer: In Fleming’s right hand rule, thumb indicates — direction of motion of the conductor; forefinger indicates — direction of magnetic field.

Class 10 Chapter 13 Magnetic Effects of Electric Currents Extra Questions 3

Question 4: A positively charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is

(a) towards north (b) towards east (c) downward (d) upward

Answer: (d) Upward (Apply Fleming’s left hand rule).

Question 5: A charged particle enters at right angle into a uniform magnetic field as shown. What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interaction with the magnetic field?

Class 10 Chapter 13 Magnetic Effects of Electric Currents Extra Questions 5

Answer: Using Fleming’s left hand rule, the nature of charged particle is positive.

Question 6: Name any two appliances which are based on the application of heating effect of electric current.

Answer: Room heater and geyser.

Question 7: Why and when does a current carrying conductor kept in a magnetic field experience force? List the factors on which direction of this force depends?

Answer: The drifting of free electrons of a conductor in a definite direction causes the current to flow through it. When such conductor is placed in a uniform magnetic field, each drifted electron of a conductor experience a magnetic force. This force is collectively experience by a conductor as a whole. Hence a current carrying conductor kept in a magnetic field experience a force. The direction of magnetic force depends on (i) direction of current through the conductor, and (ii) direction of magnetic field.

Question 8: How is the strength of magnetic field near a straight current-conductor (i) related to the strength of current in the conductor? (ii) is affected by changing the direction of flow of current in the conductor?

Answer: (i) The strength of magnetic field around a straight current conductor increases on increasing the strength of current in the conductor or vice versa.

(ii) The direction of magnetic field around a straight current carrying conductor gets reversed if the direction of current through that conductor is reversed.

Question 9: What is meant by the term ‘frequency of an alternating current’? What is its value in India? Why is an alternating current considered to be advantageous over direct current for long range transmission of electric energy?

Answer: Frequency of Alternating current is equal to the number of cycles completed in one second. In India, frequency of AC is 50 Hz i.e. 50 cycles per second.

An alternating current is considered to be advantageous over direct current for long range transmission of electric energy because it can be transmitted over long distances to distant places without much loss of electric power as compared to direct current.

Question 10: Explain any two situations that can cause electrical hazards in domestic circuits.

Answer: (i) Connecting too many electrical devices to a single socket or in the extension cord for any length of time draws high current from the mains that will exceed the current rating of connecting wires. The wires cannot withstand such a high current and melt and may cause fire.

(ii) Most electrical hazards in domestic circuits are caused by the faulty electrical outlets, old and out-dated appliances. The chances of short circuit i.e., contact of live wire and neutral wires with each other due to damage in their insulation or some fault in the appliances are very high. It may result spark at the contact point which may even cause fire,

Question 11: List major differences between an electric motor and a generator.

Question 12: The given magnet is divided into three parts A, B, and C. Name the parts where the strength of the magnetic field is: (i) maximum (ii) minimum. How will the density of magnetic field lines differ at these parts?

Answer: (i) Maximum strength – at A and C

(ii) Minimum strength – at B At A and C, magnetic field lines are crowded while at B, they are spread out.

Question 13: A compass needle is placed near a current-carrying wire. State your observation for the following cases, and give reason for the same in each case. (a) Magnitude of electric current in the wire is increased. (b) The compass needle is displaced away from the wire.

Answer: (a) Observation: The deflection of the needle increases.

Reason: Magnetic field strength due to current-carrying wire increases as current in the wire increases, B ∝ I

(b) Observation: The deflection in the compass needle decreases as its displacement from the current carrying wire increases.

Reason: The strength of magnetic field reduces with the increase in distance from the wire as B ∝ I/r.

Question 14: (a) Two magnets are lying side by side as shown below. Draw magnetic field lines between poles P and Q.

(b) What does the degree of closeness of magnetic field lines near the poles signify?

Class 10 Chapter 13 Magnetic Effects of Electric Currents Extra Questions 14 ii

(b) The degree of closeness of magnetic field lines near the poles signify that the field is stronger there, i.e. the pole of another magnet when placed in the magnetic field experiences a greater force where the field lines are crowded.

Question 15: Magnetic field lines of two magnets are shown in fig. A and fig. B.

Class 10 Chapter 13 Magnetic Effects of Electric Currents Extra Questions 15

Select the figure that represents the correct pattern of field lines. Give reasons for your answer. Also name the poles of the magnets facing each other.

Answer: Figure B represents the correct pattern of field lines. In figure A, field lines cross each other which is not possible because if they cross each other, at the point of intersection, there would be two directions of field lines.

In figure B, field lines are emerging in nature, so poles of magnet facing each other are north poles while opposite faces will have south polarity.

Question 16: Insulation cover of which colour is conventionally used for earth wire? Why is an earth wire connected to metallic parts of appliances?

Answer: For earth wire, green or yellow colour insulation is used. The earth wire provides the low resistance conducting path for the current and maintains the potential of appliances body with that of the earth. So, earth wire is used as a safety measure.

Question 17: Identify the poles of the magnet in the given figure (1) and (2).

Class 10 Chapter 13 Magnetic Effects of Electric Currents Extra Questions 17 i

Answer: Field lines emerge from north pole (N) and merge at the south pole (S) as shown in both the figures

Class 10 Chapter 13 Magnetic Effects of Electric Currents Extra Questions 17 ii

Question 18: Explain the role of fuse in series with any electrical appliance in an electric circuit. Why should a fuse with defined rating for an electric circuit not be replaced by one with a larger rating?

Answer: Fuse is a safety device connected in series with live wire or with any electrical appliance in an electric circuit. It stops the flow of unduly high electric current in the circuit by getting melted due to rise in temperature as per Joule’s law of heating.

High rating fuse wire has the larger capacity. So, it will not stop the flow of any relatively high current. Therefore, electrical devices cannot be protected from the possible damage.

Question 19: The magnetic field associated with a current-carrying straight conductor is in anticlockwise direction. If the conductor was held along the east-west direction, what will be the direction of current through it? Name and state the rule applied to determine the direction of current.

Answer: Direction of current – east to west as determined by Right-hand thumb rule. Ri’-lu-Uand Thumb

Rule: If we hold a current-carrying conductor by right hand in such a way that the stretched thumb is along the direction of current, then the curly fingers around the conductor represents the direction of field lines of magnetic field.

Question 20: Two circular coils A and B are placed close to each other. If the current in the coil A is changed, will some current be induced in the coil B? Give reason.

Answer: Yes, when a current in coil A changes, magnetic field lines linked with coil B also change. Hence, due to change in number of magnetic field lines, there is an induced current in coil B.

Question 21: When is the force experienced by a current-carrying conductor placed in a magnetic field largest?

Answer: When the length of current-carrying conductor and direction of magnetic field are perpendicular to each other, the maximum force is experienced by the current-carrying conductor.

Question 22: State one main difference between A.C and D.C. Why A.C is preferred over D.C for long range transmission of electric power? Name one source each of D.C and A.C.

Answer: Difference between A.C. and D.C. The alternating current (A.C.) reverses its direction periodically whereas the direct current (D.C.) always flows in one direction.

A.C. is preferred over D.C. because it can be transmitted over long distance without much loss of energy.

D.C. source: Battery A.C. source: A.C. generator

Question 23: State the consequences that can lead to a short circuit. (or)

One of the major cause of fire in office building is short circuiting. List three factors which may lead to the short circuit.

Answer: It occurs as a consequence of

failure of electrical insulation’s due to which live wire comes in direct contact with neutral or earth wire.
presence of external conducting material such as water which is introduced accidentally into the circuit.
electrical appliances are forced to operate when its moving parts are jammed.
connection of current carrying parts of electrical equipment’s comes in contact to one another due to human or natural cause and use of less rating wires.
When this happens, there is an excessive electric current which can damage the circuit and may also cause electrical fires.

Question 24: What is short circuiting? State one factor/condition that can lead to it. Name a device in the household that acts as a safety measure for it. State the principle of its working.

Answer: Short circuiting: When electric circuit offers very low resistance to the flow of current through it, the current increases heavily and the circuit is said to be short circuited. It occurs when live wire touches the neutral wire. This happens due to the damage in insulation of the power lines.

Safety measure device: Fuse.

Working principle of fuse: It works on the heating effect of electric current or Joule’s law of heating.

According to this law, the heat produced in a resistor is directly proportional to the

(i) square of current for a given resistance. (ii) resistance for a given current and (iii) time for which the current flows through the resistor.

We know, H = I 2 Rt So, when current in the circuit increases, the wire with low melting point in it melts to the heat generated.

Hence, the circuit breaks and electrical devices and appliances are saved. _

Question 25: Write one application of each of the following: (a) Right-hand thumb rule (b) Fleming’s left hand rule (c) Fleming’s right hand rule

Answer: (a) Right-hand thumb rule is used to find the direction of magnetic field in a coil of wire and the electric current in a straight conductor.

(b) Fleming’s left hand rule is used to find the direction of force exerted on a current carrying conductor placed in a magnetic field as in electric motor.

(c) Fleming’s right hand rule is used to find the direction of induced current in a closed circuit placed in changing magnetic field as in electric generator.

Question 26: State one main difference between A.C. and D.C. Why is A.C. preferred over D.C. for long range transmission of electric power? Name one source each of D.C. and A.C.

Answer: Difference between A.C. and D.C.: The alternating current (A.C.) reverses its direction periodically whereas the direct current (D.C.) always flows in one direction.

Question 27: What is meant by solenoid? How does a current carrying solenoid behave? Give its main use.

Answer: Solenoid: A coil of many circular turns of insulated copper wire wound on a cylindrical insulating body (i.e., cardboard etc.) such that its length is greater than its diameter is called solenoid.

When current is flowing through the solenoid, the magnetic field line pattern resembles exactly with those of a bar magnet with the fixed polarity, i.e. North and South pole at its ends and it acquires the directive and attractive properties similar to bar magnet. Hence, the current carrying solenoid behave as a bar magnet.

Use of current carrying solenoid: It is used to form a temporary magnet called electromagnet as well as permanent magnet.

Question 28: What are magnetic field lines? Justify the following statements

(a) Two magnetic field lines never intersect each other. (b) Magnetic field lines are closed curves.

Answer: Magnetic field lines: It is defined as the path along which the unit North pole (imaginary) tends to move in a magnetic field if free to do so.

(a) The magnetic lines of force do not intersect (or cross) one another. If they do so then at the point of intersection, two tangents can be drawn at that point which indicates that there will be two different directions of the same magnetic which field, i.e. the compass needle points in two different directions which is not possible.

(b) Magnetic field lines are closed continuous curves. They diverge from the north pole of a bar magnet and converge its south pole. Inside the magnet they move from south pole to north pole.

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Class 10 Physics (India)

Course: class 10 physics (india) > unit 4.

Quiz 1 Magnetic effects of electric current

NCERT Solutions
NCERT Solutions for Class 10
NCERT Class 10 Science
Chapter 13 Magnetic Effects Electric Current

NCERT Solutions for Class 10 Science Chapter 13: Magnetic Effects of Electric Current

Ncert solutions for class 10 science chapter 13 – cbse free pdf download.

* According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 12.

NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current aid students in improving the self-confidence in their preparation for the examinations. It is the best reference material to build a foundation for Science subjects for both board and other entrance examinations. NCERT Solutions for Class 10 Science, Chapter 13 Magnetic Effects of Electric Current are generally used by every student during their exam preparations. Our subject experts have explained all the questions effectively, as provided in the NCERT textbooks. These NCERT Solutions for Class 10 Science are prepared by our team of highly experienced subject experts after thorough research. They are available in a simple language so that students can learn and understand the entire concept at a deeper level.

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Access Answers of Science NCERT Solutions for Class 10 Chapter 13 – Magnetic Effects of Electric Current

In text 13.1 page:224.

1. Why does a compass needle get deflected when brought near a bar magnet?

The compass needle is a small magnet. When the compass needle is brought close to a bar magnet, the magnetic field lines of the compass needle interact with the magnetic field lines of the bar magnet, which causes the compass needle to deflect.

In text 13.2.2 Page:228

1. Draw magnetic field lines around a bar magnet.

Magnetic field lines of a bar magnet emerge from the North Pole and terminate at the South Pole, as shown in the figure below.

NCERT Solutions Class 10 Science Chapter 13 - 1

2. List the properties of magnetic field lines.

The properties of magnetic field lines are as follows:

Magnetic field lines do not intersect with each other.
They emerge from the North Pole and terminate at the South Pole.
Inside the magnet, the direction of the field lines is from the South Pole to the North Pole.

3. Why don’t two magnetic field lines intersect each other?

If two magnetic field lines intersect, then at the point of intersection, the compass needle shows two different directions, which is not possible. Hence they do not intersect with each other.

In text 13.2.4 Page:229

1. Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.

NCERT Solutions Class 10 Science Chapter 13 - 2

For the downward direction of the current, the direction of the magnetic field will be as if emerging from the table outside the loop and merging with the table inside the loop. Similarly, for current flowing in an upward direction, the direction of the magnetic field will be as if they are emerging from the table outside the loop and merging with the table inside the loop, as shown in the figure.

2. The magnetic field in a given region is uniform. Draw a diagram to represent it.

NCERT Solutions Class 10 Science Chapter 13 - 3

3. Choose the correct option.

The magnetic field inside a long straight solenoid-carrying current

decreases as we move towards its end.
increases as we move towards its end.
is the same at all points.

d. is the same at all points

The magnetic field inside a long straight current-carrying solenoid is uniform. Therefore, it is the same at all points.

In text 13.3 Page:231

1. Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)

When a proton enters the region of a magnetic field, it experiences a magnetic force. Due to this, the path of the proton becomes circular. As a result, the velocity and the momentum change.

2. In Activity 13.7, how do we think the displacement of rod AB will be affected if (i) current in rod AB is increased; (ii) a stronger horse-shoe magnet is used; and (iii) length of the rod AB is increased?

A current-carrying conductor, when placed in a magnetic field, experiences force. The magnitude of this force will increase with the increase in the amount of current, the length of the conductor and the strength of the magnetic field. Hence, the strength of the magnetic force exerted on the rod AB and its displacement will increase if

The current in rod AB is increased
A stronger horseshoe magnet is used
When the length of the rod AB increases

3. A positively-charged particle (alpha-particle) projected towards the west is deflected towards north by a magnetic field. The direction of magnetic field is

towards south
towards east

The direction of the magnetic field can be determined using Fleming’s Left-hand rule. According to the rule, if we arrange our thumb, forefinger and the middle finger of the left hand right perpendicular to each other, then the thumb points towards the direction of the magnetic force, the middle finger the direction of current and the forefinger the direction of magnetic field. Since the direction of the positively charged particle is towards the west, the direction of the current will also be towards the west. The direction of the magnetic force is towards the north. Hence the direction of the magnetic field will be upward according to Fleming’s Left-hand rule.

In text 13.4 Page:233

1. State Fleming’s left-hand rule.

Fleming’s Left-hand rule states that if we arrange our thumb, forefinger and middle finger of the left hand at right angles to each other, then the thumb points towards the direction of the magnetic force, the forefinger points towards the direction of the magnetic field and the middle finger points towards the direction of the current.

2. What is the principle of an electric motor?

The working principle of an electric motor is based on the magnetic effect of current. A current-carrying conductor, when placed in a magnetic field, experiences force and rotates. The direction of the rotation of the conductor can be determined by Fleming’s Left-hand rule.

3. What is the role of split ring in an electric motor?

The split ring plays the role of a commutator in an electric motor. The commutator reverses the direction of the current flowing through the coil after each half-rotation of the coil. Due to this reversal of current, the coil continues to rotate in the same direction.

In text 13.5 Page:236

1. Explain different ways to induce current in a coil.

Following are the different ways to induce a current in a coil:

If the coil is moved rapidly between the two poles of a horseshoe magnet, an electric current is induced in the coil.
When a magnet is moved relative to the coil, an electric current is induced in the coil.

In text 13.6 Page:237

1. State the principle of an electric generator.

An electric generator works on the principle of electromagnetic induction. In a generator, electricity is generated by rotating a coil in the magnetic field.

2. Name some sources of direct current.

DC generators and cells are some sources of direct current.

3. Which sources produce alternating current?

Power plants and AC generators are some of the sources that produce alternating current.

4. Choose the correct option.

A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each

two revolutions
one revolution
half revolution
one-fourth revolution

c. half revolution

When a rectangular coil is rotated in a magnetic field, the direction of the induced current changes once in a half revolution; as a result, the direction of the current in the coil remains the same.

In text 13.7 Page:238

1. Name two safety measures commonly used in electric circuits and appliances.

The safety measures commonly used in electric circuits are as follows:

Each circuit should be connected to a fuse because a fuse prevents the flow of excessive current through the circuit. When the current in the circuit exceeds the maximum limit of the fuse element, the fuse melts to stop the flow of current protecting the appliance connected to the circuit.

Earthing protects the user from electric shocks. Any leakage of current in an appliance is transferred to the ground by earthing, and the people using the appliance are prevented from getting electrocuted.

2. An electric oven of 2 kW power rating is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.

The current drawn by the electric oven can be calculated using the formula

Substituting the values, we get

I = 2000 W/220 V = 9.09 A

The current drawn by the electric oven is 9.09 A which exceeds the safe limit of the circuit. This causes the fuse to melt and break the circuit.

3 . What precaution should be taken to avoid the overloading of domestic electric circuits?

A few of the precautions to be taken to avoid the overloading of domestic electric circuits are as follows:

Connecting too many devices to a single socket should be avoided
Using too many appliances at the same time should be avoided
Faulty appliances should not be connected to the circuit

Exercises Page:240

1. Which of the following correctly describes the magnetic field near a long straight wire?

The field consists of straight lines perpendicular to the wire.
The field consists of straight lines parallel to the wire.
The field consists of radial lines originating from the wire.
The field consists of concentric circles centered on the wire.

4. The field consists of concentric circles centred on the wire.

The magnetic field near a long straight wire is concentric circles. Their centres lie on the wire.

2. The phenomenon of electromagnetic induction is

the process of charging a body.
the process of generating a magnetic field due to a current passing through a coil.
producing induced current in a coil due to relative motion between a magnet and the coil.
the process of rotating a coil of an electric motor.

3. producing induced current in a coil due to relative motion between a magnet and the coil.

The phenomenon of inducing current in a coil due to the relative motion between the coil and the magnet is known as electromagnetic induction.

3. The device used for producing electric current is called a

galvanometer

a. generator

The device used for producing electric current is known as a generator. The generator converts mechanical energy to electric energy.

4. The essential difference between an AC generator and a DC generator is that

AC generator has an electromagnet while a DC generator has permanent magnet.
DC generator will generate a higher voltage.
AC generator will generate a higher voltage.
AC generator has slip rings while the DC generator has a commutator.

4. AC generator has slip rings, while the DC generator has a commutator.

AC generators have two rings known as the slip rings, while DC generators have two half rings known as the commutator. This is the main difference between AC generator and DC generator.

5. At the time of short circuit, the current in the circuit

reduces substantially.
does not change.
increases heavily.
vary continuously.

3. increases heavily

When two naked wires in the circuit come in contact with each other, the amount of current flowing in the circuit increase abruptly resulting in short circuit.

6. State whether the following statements are true or false.

An electric motor converts mechanical energy into electrical energy.
An electric generator works on the principle of electromagnetic induction.
The field at the center of a long circular coil carrying current will be parallel straight lines.
A wire with a green insulation is usually the live wire of an electric supply.

An electric motor converts electrical energy into mechanical energy.

An electric generator is a device that generates electricity by rotating a coil in a magnetic field.

A long circular coil is a solenoid. The magnetic field lines inside a solenoid are parallel straight lines.

Live wires have red insulation cover, while the earth wire has green insulation.

7. List two methods of producing magnetic fields.

Following are the methods of producing magnetic fields:

By using a permanent magnet, we can produce a magnetic field, and it can be visualized by spreading iron fillings on white paper and keeping a magnet beneath the paper.
A current-carrying straight conductor produces magnetic field.
Different types of conductors, such as solenoid and circular loops, can be used to see the presence of a magnetic field.

8. How does a solenoid behave like a magnet? Can you determine the north and south poles of a current–carrying solenoid with the help of a bar magnet? Explain.

A solenoid is a long coil of circular loops of insulated copper wire. The magnetic field produced around the solenoid when the current is passed through it is similar to the magnetic field produced around the bar magnet when a current is passed through it. The figure shown below shows the arrangement of magnetic fields produced around the solenoid when current is passed through it.

NCERT Solutions Class 10 Science Chapter 13 - 4

When the north pole of the bar magnet is brought close to the end connected to the negative terminal of the battery, the solenoid repels the battery. As like poles repel each other, we can infer that the end connected to the negative terminal behaves as a north pole while the end connected to the positive terminal behaves as a south pole.

9. When is the force experienced by a current–carrying conductor placed in a magnetic field largest?

When the direction of the current is perpendicular to the direction of the magnetic field, the force experienced is the largest.

10. Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?

The direction of the magnetic field can be determined using Fleming’s Left-hand rule. The direction of the magnetic field will be perpendicular to the direction of the current and the direction of deflection, i.e., either upward or downward. The direction of the current is from the front wall to the back wall because negatively charged electrons move from the back wall to the front wall. The direction of the magnetic force is rightward. Hence, using Fleming’s left-hand rule, it can be concluded that the direction of the magnetic field inside the chamber is downward.

11. Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor?

An electric motor is a device that converts electrical energy to mechanical energy. It works on the principle of the magnetic effect of current. The figure listed below shows a simple electric motor.

NCERT Solutions Class 10 Science Chapter 13 - 5

When current is made to flow through the coil MNST by closing the switch, the coil starts to rotate in the anticlockwise direction. This is due to the downward force acting on the length MN and simultaneously an upward force acting along the length ST. As a result of which, the coil rotates in the anticlockwise direction. Current in the length MN flows from M to N, and the magnetic fields act from left to right normal to the length MN. According to Fleming’s Left-Hand rule, a downward force acts along the length MN. Similarly, the current along the length ST flows from S to T and the magnetic field acts from left to right. Therefore, an upward force acts along the length ST. These two forces together cause the coil to rotate anti-clockwise. After half a rotation, the position of MN and ST interchange. The half-ring C comes in contact with brush B and the half-ring D comes in contact with rush C. Hence the direction of current in the coil MNST gets reversed.

12. Name some devices in which electric motors are used.

A few devices in which electric motors are used are:

Electric fans
Water pumps
Washing machines

13. A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is (i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary inside the coil?

(i) When a bar magnet is pushed into the coil, a current is induced in the coil momentarily. As a result, the galvanometer deflects in a particular direction momentarily.

(ii) When the bar magnet is withdrawn from inside the coil, a current is induced momentarily but in the opposite direction, and the galvanometer deflects in the opposite direction momentarily.

(iii) When the bar magnet is held stationary inside the coil, no current will be induced. As a result, there will be no deflection in the galvanometer.

14. Two circular coils A and B are placed closed to each other. If the current in the coil A is changed, will some current be induced in the coil B? Give reason.

When the current in coil A changes, the magnetic field associated with it also changes. As a result, the magnetic field around coil B undergoes change. The change in the magnetic field of coil B induces a current in it.

15. State the rule to determine the direction of a (i) magnetic field produced around a straight conductor-carrying current, (ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, and (iii) current induced in a coil due to its rotation in a magnetic field.

(i) The rule used to determine the direction of the magnetic field produced around a straight conductor-carrying current is Maxwell’s right-hand thumb rule.

(ii) The rule used to determine the force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it is the Fleming’s left hand rule.

(iii) The rule used to determine the current induced in a coil due to its rotation in a magnetic field is Fleming’s right-hand rule.

16. Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?

The electric generator converts mechanical energy into electrical energy. The working principle of the electric generator is electromagnetic induction. It generates electricity by rotating a coil in the magnetic field. The figure below shows the construction of a simple AC generator.

NCERT Solutions Class 10 Science Chapter 13 - 6

In the diagram,

A and B are brushes.

C and D are slip rings.

X is the axle.

G is the galvanometer.

When the axle X is rotated clockwise, MN moves upwards while ST moves downward. The movement of MN and ST in the magnetic field results in the production of electric current due to electromagnetic induction. MN moves upwards, and the magnetic fields act from left to right. Therefore, according to Fleming’s right hand rule, the direction of the induced current will be from M to N along the length MN. Similarly, the direction of the induced current will be from S to T along the length ST. The direction of the current in the coil is MNST. Hence, the galvanometer shows a deflection in a particular direction.

After half a rotation, length MN starts moving downwards while the length ST starts moving upwards. Now, the direction of the induced current reverses to TSNM. Since the direction of the induced current reverses every half rotation, the current induced is known as alternating current.

Function of Brushes

Brushes are kept pressed onto two slip rings separately. The outer ends of the brushes are connected to the galvanometer. Thus, brushes help in transferring current from the coil to the external circuit.

When does an electric short circuit occur?

Listed below are two instances of when a short-circuit can occur:

1) When too many appliances are connected to a single socket or when high power rating appliances are connected to a light circuit, the resistance of the circuit becomes low. As a result, the current flowing through the circuit becomes very high. This condition results in a short circuit.

2) When live wires whose insulation has worn off come in contact with each other, the current flowing in the circuit increases abruptly, which results in a short circuit.

18. What is the function of an earth wire? Why is it necessary to earth metallic appliances?

The metallic body of electric appliances is earthed by means of an earth wire. Any leakage of electric wire is transferred to the ground by means of the earth wire. This prevents the user of the electric appliance from getting electric shocks. This is the reason why it is important for metallic appliances to be earthed.

NCERT Solutions for Class 10 Science Chapter 13 – Magnetic Effects of Electric Current

As per the updated marking scheme, NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current is one of the important topics, and the expected weightage is 10 marks. In this chapter, students learn more in detail about Electric Current, Magnetic fields, magnetic field lines, compass, electromagnetic induction, Effects of Electric Current and so on. Oersted’s law and his Experiment is the most important 5-mark question, which has been the most frequently asked in the previous year papers.

List of Exercises

13.1 Magnetic Field and Field Lines

13.2 Magnetic Field due to a Current-Carrying Conductor

13.3 Force on a Current-Carrying Conductor in a Magnetic Field

13.4 Electric Motor

13.5 Electromagnetic Induction

13.6 Electric Generator

Magnetic Effects of Electric Current are also known as the electromagnetic effect. It is the branch of physics which mainly deals with the study of the electromagnetic force, electrically charged particles, electric fields and magnetic fields. In this topic, students can learn more interesting concepts related to Magnetic fields and Electric Current, along with a few interesting experiments. Other interesting topics explained in this chapter include:

Properties of the magnet – 2 Questions (1 short, 1 MCQ)
How does magnetic effect work -1 Question (1 MCQ)
Clock Face Rule-1 Question (1 short)
Fleming’s left-hand rule-1 Question (1 long)
Maxwell’s Right Hand Thumb Rule and its Application -1 Question (1 long)

Key Features of NCERT Solutions for Class 10 Science Chapter 13 – Magnetic Effects of Electric Current:

Provides solved solutions to all the questions in the respective NCERT textbooks.
The language used in these NCERT Solutions is easy and simple to understand for the students.
These solutions are prepared by our subject experts after extensive research on every topic in order to provide appropriate and genuine information to the students.
These solutions will be useful for Olympiads, CBSE exams and other competitive exams.
Detailed answers are provided to all the questions to help students in their preparations.

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CBSE Chapter 13 Magnetic Effect of Electric Current Class 10 MCQ

MCQs on Class 10 Science Magnetic Effect of Electric Current

The recent question pattern of CBSE final examinations is more concentrated on different types of objective-type questions. At least 50% of the total marks are going to be allotted for MCQs on the examinations. So, it’s important to practice and memorise all the Magnetic Effect of Electric Current class 10 MCQ properly.

Class 10 boards are one of the many crucial examinations you will ever encounter. The result of this particular examination is going to build your path to further education. Having clear concepts on science subjects is very much important in case you are going to move forward with the Science stream after the 10th. Solving MCQs will not only be helpful in securing better marks in the subjects but also to build up your concepts on a significant subject matter.

Concepts you Need to Solve Magnetic Effect of Electric Current Class 10 MCQ

Before you start practising MCQs or start finding all probable questions that can be asked from the chapter with answers, here’s the list of concepts from the chapter you need to gulp.

About Magnetic Field and Field Lines

Magnetic Field in presence of a straight current-carrying conductor

Magnetic Field created with current carrying circular loop

Magnetic Field due to a current carrying solenoid

Force-carrying conductor in a Magnetic Field

Electric Motor

Electromagnetic Induction

Electric Generator

Domestic Electric Circuits

Chapter 13 Magnetic Effect of Electric Current Class 10 MCQs with Answers

1. Which of the following is the property of a magnetic field?

A) It can change the direction of a moving charged particle

B) It can change the speed of a moving charged particle

C) It can create an electric field

D) It can create a gravitational field

Answer : A) It can change the direction of a moving charged particle

2. Which of the following is the direction of the magnetic field produced by a straight current-carrying conductor?

A) Away from the conductor

B) Towards the conductor

C) Parallel to the conductor

D) Perpendicular to the conductor

Answer : D) Perpendicular to the conductor

3. Which of the following is the SI unit of magnetic field?

Answer : D) Tesla

4. When a current-carrying conductor is placed in a magnetic field, what is the force experienced by the conductor?

A) Electric force

B) Gravitational force

C) Magnetic force

D) None of the above

Answer : C) Magnetic force

5. When a current-carrying coil is placed in a magnetic field, what is the force experienced by the coil?

6. Which of the following is the direction of the force experienced by a current-carrying conductor placed in a magnetic field?

A) Along the direction of the current

B) Opposite to the direction of the current

C) Perpendicular to the direction of the current and the magnetic field

D) Parallel to the direction of the current and the magnetic field

Answer : C) Perpendicular to the direction of the current and the magnetic field

7. Which of the following is the direction of the force experienced by a current-carrying coil placed in a magnetic field?

8. What is the formula for the magnetic force experienced by a current-carrying conductor placed in a magnetic field?

B) F = BIL sinθ

C) F = BIL cosθ

D) F = BIL tanθ

Answer : B) F = BIL sinθ

9. What is the formula for the magnetic force experienced by a current-carrying coil placed in a magnetic field?

10. What is an electromagnet?

A) A magnet made of iron

B) A magnet made of copper

C) A magnet made of steel

D) A magnet made of a current-carrying coil

Answer : D) A magnet made of a current-carrying coil

11. What is the principle behind the working of an electric motor?

A) Magnetic effect of current

B) Heating effect of current

C) Chemical effect of current

D) Electrostatics

Answer : A) Magnetic effect of current

12. Which of the following is the device that converts mechanical energy into electrical energy?

C) Transformer

D) Resistor

Answer : A) Dynamo

13. Which of the following is the device that converts electrical energy into mechanical energy?

Answer : B) Motor

14. What is the formula for calculating the speed of rotation of a motor?

A) N = (60f/p)

B) N = (V/R)

C) N = (P/E)

D) N = (I/R)

Answer : A) N = (60f/p)

15. Which of the following is the device that increases or decreases the voltage of an alternating current?

Answer : C) Transformer

Importance of MCQs on Class 10 Science Chapter Magnetic Effect of Electric Current

Increases your efficiency of revision.

To answer MCQs properly, you need to go through the textbook thoroughly. However, when you practice daily MCQs on Magnetic Effect, wrong answers or forgotten ones require you to check the topics one more. By doing these repeated revisions on the topics, you will get more efficient in the subject matters.

Easy to Answer and Scoring

As only one of the options is correct among the others in MCQs, memorising the correct answer properly is the only way to answer which is much easier if you just practice well. There is no worry of elimination of marks once your answer is correct, unlike subjective questions. Answering all of the MCQs correctly can secure a huge percentage of marks in no time.

Concept-Based

After you’re done with understanding all the topics from the above list, when you look for Magnetic Effect of Electric Current Class 10 MCQ PDF , you will see that most of the questions are concept-based.

All you have to do is keep your fundamentals of the topics clear. In case of doubts, seek expert help.

Boosts Confidence

Daily practice of MCQ sets boosts your confidence. When you can check how many questions you can answer correctly, and how many are wrong, that gives you the idea of preparedness for the exam. You will know where to put extra attention.

Exact Marking

There is no worry about mark deduction in MCQs. If your answer is right, you will get the exact mark. So, it’s important to crack all the MCQs from the chapter for securing better marks.

Steps to Secure all the Marks Assigned to Magnetic Effect of Electric Current MCQs

Learn about the elimination strategy of answering mcqs.

By only practicing, you will get the strategies for answering MCQs properly. The elimination strategy is about eliminating the wrong ones first while looking at the question for the very first time.

Always try to answer the questions you are confident about first. Don’t try to think about unknown ones as that will only confuse you more and kill time.

Make Notes While Studying the Chapter

Start making your own notes while studying the chapter from the very beginning. Noting down every important fact or concept will help you memorise the MCQs better. You can also get an idea of your doubts during this phase. Clarifying your doubts will give you more confidence in the chapter.

Download MCQs from the Magnetic Effect of Electric Current Class 10 PDF

Once you have a clear idea of the concepts of the topics in Magnetic Effect, download as many Magnetic Effects of Electric Current Class 10 MCQ PDF as possible and start practising. In case of any doubts, you can always seek expert help from Vedantu’s website.

Focus on MCQs before it’s too late as CBSE is updating its pattern every time after boards with giving more weightage on objective-type questions.

FAQs on CBSE Chapter 13 Magnetic Effect of Electric Current Class 10 MCQ

1. What are the types of MCQs in Magnetic Effect Chapter Class 10?

There are mainly three types of MCQs that can be asked in the examinations, stand-alone, assertion-reason-based, and case-based. The only way to know about the types that are repeatedly coming in examinations, look for previous years' question papers.

2. Where to look for the MCQs on Magnetic Effect Class 10?

NCERT textbook of Class 10 contains several questions after the end of the chapter. Start from there. You can also find NCERT textbook solution manual online in case you can’t answer anything on your own. There are several articles on the Magnetic Effect of Electric Current Class 10 MCQ with Answers available so that you can go through them last minute. These are set up by Vedantu’s top tutors on the subject from all over the nation.

3. Exactly how much time is enough to practice MCQs Class 10?

There is no hard and fast rule of time for practising MCQs. However, you can allot some certain time daily to practice MCQs daily.

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MCQ Questions for Class 10 Science Magnetic Effects of Electric Current with Answers

Free PDF Download of CBSE Class 10 Science Chapter 13 Magnetic Effects of Electric Current Multiple Choice Questions with Answers. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 10 Science Magnetic Effects of Electric Current Multiple Choice Questions with Answers to know their preparation level.

Class 10 Science MCQs Chapter 13 Magnetic Effects of Electric Current

1. The magnetic field lines always begin from (a) N-pole and end on S-pole. (b) S-pole and end on N-pole. (c) start from the middle and end at N-pole. (d) start from the middle and end at S-pole.

2. The magnetic field is the strongest at (a) middle of the magnet. (b) north pole. (c) south pole. (d) both poles.

3. Material of the core of a strong magnet is (a) aluminium (b) soft iron (c) copper (d) steel

4. Magnetic lines of force inside current carrying solenoid are (a) perpendicular to axis. (b) along the axis and are parallel to each other. (c) parallel inside the solenoid and circular at the ends. (d) circular.

5. A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside the solenoid (a) will become zero. (b) will increase. (c) will decrease. (d) will remain unaffected.

6. An electric generator actually acts as (a) a source of electric charge. (b) a source of neat energy. (c) an electromagnet. (d) a converter of energy.

7. A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act (a) vertically upwards. (b) towards east. (c) vertically downwards. (d) towards north.

8. The direction of force on a current carrying conductor in a magnetic field is given by (a) Fleming’s left hand rule. (b) Fleming’s right hand rule. (c) Right hand thumb rule. (d) Left hand thumb rule.

9. The direction of induced current is given by (a) Fleming’s right hand rule. (b) Fleming’s left hand rule. (c) Right hand thumb rule. (d) Left hand thumb rule.

0. Switches are connected to (a) live wire. (b) neutral wire. (c) earth wire. (d) any one.

11. The most important safety method used for protecting home appliances from short-circuiting or Overloading is (a) earthing (b) use of stabilizers (c) use of fuse (d) use of electric meter

12. The best material to make permanent magnets is (a) aluminium (b) soft iron (c) copper (d) alnico

Fill in the Blanks

1. The magnetic field of a solenoid carrying a current is similar to that of a ……….. . 2. The direction of the induced current is given by ……….. 3. A generator converts ……….. into ……….. . 4. In our houses, we receive AC electric power of ……….. V with a frequency of ……….. Hz. 5. The direction of magnetic force acting on a charged particle moving in a magnetic field can be found by ……….. . 6. According to Fleming’s left hand rule, if the first finger points in the direction of ……….., the second finger in the direction of ……….., then the thumb will point in the direction of ……….. .

1. bar magnet 2. Fleming’s right hand rule 3. mechanical energy, electrical energy 4. 200 V, 50 Hz 5. Fleming’s left hand rule 6. magnetic field, current, force acting on the conductor

We hope the given MCQ Questions for Class 10 Science Magnetic Effects of Electric Current with Answers will help you. If you have any query regarding CBSE Class 10 Science Chapter 1 Magnetic Effects of Electric Current Multiple Choice Questions with Answers, drop a comment below and we will get back to you at the earliest.

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Case Study Questions Class 10 Science Magnetic Effects of Electric Current
CBSE Case Study Questions Class 10 Science Magnetic Effects of Electric Current. Case Study - 1. Andre Marie Ampere suggested that a magnet must exert an equal and opposite force on a current carrying conductor, which was experimentally found to be true. But we know that current is due to charges in motion.
Case Study Chapter 13 Magnetic Effect of Electric Current
Case Study Questions Chapter 13 Magnetic Effect Of Electric Current. Case/Passage - 1. A solenoid is a long helical coil of wire through which a current is run in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the ...
Case Study Questions Class 10 Science Chapter 13 Magnetic Effects of
Here, we have provided case-based/passage-based questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current. Case Study/Passage Based Questions. Question 1: An electric motor is a rotating device that converts electrical energy into mechanical energy electric motors are used as an important component in electric fans ...
Case Study Questions for Class 10 Science Chapter 13 Magnetic Effect of
Case Study Questions for Class 10 Science Chapter 13 Magnetic Effect of Electric Current Question 1: A student wants to study the working of electric motor. He used a model of DC motor for electromagnetism as shown in figure. He fixed the two ends of the coil to a pair of curved elastic metal strips. … Continue reading Case Study Questions for Class 10 Science Chapter 13 Magnetic Effect of ...
CBSE 10th Science Magnetic Effects of Electric Current Case Study
CBSE 10th Standard Science Subject Magnetic Effects of Electric Current Case Study Questions With Solution 2021. An insulated copper wire wound on a cylindrical cardboard tube such that its length is greater than its diameter is called a solenoid. When an electric current is passed through the solenoid, it produces a magnetic field around it.
Class 10 Science Chapter 12 Case Based Questions
Case study - 3. The change in electric current through the circuit produces magnetic field around it. Magnetic field is a vector quantity which has both magnitude as well as direction. The magnetic field lines produced are directed from north pole and ends at south pole. These lines are closed curves from which strength of the magnetic field is ...
Magnetic Effects of Electric Current Case Study Based Questions Class 10
These questions are asked in the Multiple Choice Questions (MCQ). These case based questions are a type of open book test. These case based questions can help students to score well in the particular subject. These Magnetic Effects of Electric Current Case Study Based Questions can also be asked in the form of CBSE Assertion and Reason.
Class 10 Science: Case Study Chapter 13 Magnetic Effects of Electric
An electric motor is a rotating device that converts electrical energy into mechanical energy electric motors are used as an important component in electric fans, refrigerators, mixer, washing machines, computers, MP3 players etc. Motor Works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it, a force acts on the coil which rotates it ...
Magnetic Effects of Electric Current Class 10 Important Questions with
Answer: (a) Refer to answer 1. Necessary parameters are: Magnitude of magnetic field. Direction of field lines. (b) If field lines of a magnetic field are crossed at a point, it indicates that there are two direction of magnetic field at a point which is not possible. Question 6.
CBSE Class 10 Physics Magnetic Effects of Electric Current Case Study
Magnetic Effects of Electric Current Case Study Questions (CSQ's) Select the number of questions for the test: TopperLearning provides a complete collection of case studies for CBSE Class 10 Physics Magnetic Effects of Electric Current chapter. Improve your understanding of biological concepts and develop problem-solving skills with expert ...
Class 10th Science
QB365 provides a detailed and simple solution for every Possible Case Study Questions in Class 10 Science Subject - Magnetic Effects of Electric Current, CBSE. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
Magnetic effects of electric current: CBSE board practice
This electricity is caused due to the Magnetic Field, and there is also a law for conversion of energy, that is energy can be transferred. Think of it as Potential Energy transferred to Kinetic Energy. These energy transfers occur all along in the process. When the magnet comes closer, the Pot (short for Potential) Energy transfers to Kin ...
Magnetic Effect of Electric Current Questions
The magnetic effect of electric current is one of the essential effects of electric current in use, without which we would not be able to have motors in the modern world. A current-carrying conductor generates a magnetic field that can be visualised using force or magnetic field lines. 10. Write a brief note on the direct current.
CBSE Class 10 Science Chapter 13 Magnetic Effects of Electric Current
This will help them to formulate a proper strategy during the science exam preparation. The students can now download the free PDF of Magnetic effect of electric current class 10 important questions from the website of Vedantu easily. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students.
Magnetic effects of electric current
Learn. Magnetic effects of electric current: CBSE board practice. Level up on all the skills in this unit and collect up to 1,200 Mastery points! Start Unit test. Magnets are fun and mysterious. But they can do a lot more than just push and pull each other from a distance. In this chapter, we will learn about the intimate relationship between ...
NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of
Magnetic Effects Of Electric Current Class 10 NCERT questions and answers were solved by the best academic experts in order to help you a better understanding. So the candidates who want to secure a decent grade in class 10 board exams can refer to this article and solve magnetic effect of electric current science class 10 NCERT solutions.
Magnetic Effects of Electric Current Class 10 Extra Questions with
In this page, you can find CBSE Class 10 Science Chapter 13 Extra Questions and Answers Magnetic Effects of Electric Current Pdf free download, NCERT Extra Questions for Class 10 Science will make your practice complete.. Class 10 Science Chapter 13 Extra Questions and Answers Magnetic Effects of Electric Current
Magnetic Effects of Electric Current
→ An electric current-carrying wire behaves like a magnet. → Electromagnets and electric motors involve the magnetic effect of electric current, and electric generators involve the electric effect of moving magnets. → Compass needle get deflected on passing an electric current through a metallic conductor.
Magnetic Effect of Electric Current Class 10 Science Extra Questions
Magnetic Effect of Electric Current Class 10 Science Extra Questions with Answers. Question 1: Name the type of current: (a) used in household supply. (b) given by a cell. Answer: (a) Alternating current. (b) Direct current. Question 2: State the direction of magnetic field in the following case.
Magnetic effects of electric current: Quiz 1
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.
NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of
Solution: The working principle of an electric motor is based on the magnetic effect of current. A current-carrying conductor, when placed in a magnetic field, experiences force and rotates. The direction of the rotation of the conductor can be determined by Fleming's Left-hand rule. 3.
CBSE Chapter 13 Magnetic Effect of Electric Current Class 10 MCQ
The recent question pattern of CBSE final examinations is more concentrated on different types of objective-type questions. At least 50% of the total marks are going to be allotted for MCQs on the examinations. So, it's important to practice and memorise all the Magnetic Effect of Electric Current class 10 MCQ properly.. Class 10 boards are one of the many crucial examinations you will ever ...
MCQ Questions for Class 10 Science Magnetic Effects of Electric Current
Class 10 Science MCQs Chapter 13 Magnetic Effects of Electric Current. 1. The magnetic field lines always begin from. (a) N-pole and end on S-pole. (b) S-pole and end on N-pole. (c) start from the middle and end at N-pole. (d) start from the middle and end at S-pole. Answer. 2.

Case Study Questions Class 10 Science Magnetic Effects of Electric Current

CBSE Case Study Questions Class 10 Science Magnetic Effects of Electric Current

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Case Study Chapter 13 Magnetic Effect of Electric Current

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