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2nd Year Physics Chapter 15 MCQs

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This place is where you will find 2nd Year Physics Chapter 15 MCQs with Answers Electromagnetic Induction. This chapter is about Electromagnetic Induction which is the creation of EMF by moving a magnetic field around an electric conductor. Faraday’s law is very important that describing the Induced EMF. Lenz’s law explains the direction of the induced EMF. The next one is mutual induction which Is the phenomenon in which a changing current in one coil induces an emf in another coil. Then there is self-induction in which changing current in a coil induces an emf itself. AC Generator and DC Generator are very useful applications here. Then there is an important concept of Transformer. You can now start preparing for the Entrance Test through the important MCQs given below.

2nd Year Physics Chapter 15 MCQs with Answers Electromagnetic Induction

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Physics Chapter 15

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If the current in a solenoid is doubled then the energy stored in its magnetic field is

2 / 20

If a current of 2 A is passing through a solenoid of inductance 2 H, then energy stores in it is:

3 / 20

If the rate of change of flux linking with a coil is doubled then emf induced in the coil is

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If the current passing through a coil of inductance 5 H decreases at the rate of 2 A/s, the induced emf in the coil is

5 / 20

Which of the following is generated first?

6 / 20

In a D.C motor; if the back emf is half of the applied battery voltage then the current at that instant is

7 / 20

Choose correct about the commutator

8 / 20

Which one of the following is also referred to as electrical inertia?

9 / 20

The mutual inductance of a pair of coils is 3H. If the current changes from 10 A to zero in 0.1 S, the emf induced in the other coil is

10 / 20

A coil is rotated in a uniform magnetic field about an axis perpendicular to the field. The emf induced in the coil would be maximum when the plane of the coil is

11 / 20

If the rate of change current is 1A/sec in the coil, the induced emf is equal to

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Keeping all other factors the same, the number of turns of a coil is doubled, and the magnetic flux linking with the coil is

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The rate at which a single conductor should cut the flux in order that a current of 1.2 mA is induced in a conductor when 10 Ω resistor is connected across its ends is

14 / 20

A bar magnet is passed through a wire loop. The induced current will be greatest when

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The number of turns in a secondary coil is twice the number of turns in the primary coil. An AC source of 200 V is connected across the primary. The voltage across secondary is

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A transformer is used to increase or decrease emf. The quantity that remains unchanged in the transformer is

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WbA–1 is the unit of

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A circular coil has N turns. If a current I produce a magnetic flux φ across the core’s cross-section then the energy stored in the magnetic field of the coil is

19 / 20

If two identical loops, one of copper and the other of iron are rotated with the same speed in a same magnetic field, then

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To induce an emf in a coil, the linking magnetic flux

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