ECAT Pre General Science Physics Chapter 15 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction

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ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction

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Question # 1

The induced current in the loop can be Increased by

Question # 2

The magnitude of induced emf depends upon the

Question # 3

Transformer is used to

Question # 4

Referring to above figure, current in the coil P grows from zero to its maximum value:

Question # 5

The work is stored in the inductor as

Question # 6

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

Question # 7

A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:

Question # 8

The rate change of area expressed is expressed in:

Question # 9

The induced emf in a coil is proportional to:

Question # 10

Eddy current is produced when:

Question # 11

The practical application of the phenomenon of Mutual induction is

Question # 12

The induced current in a conductor depends upon:

Question # 13

For inducting emf in a coil the basic requirement is that:

Question # 14

Faraday's law of electromagnetic induction has been used in the construction of:

Question # 15

The induced current in a conductor depends upon

Question # 16

An emf is set up in a conductor when it:

Question # 17

Lens's law deals with the

Question # 18

The induced current is a conductor depends upon:

Question # 19

A device which converts Electrical energy into mechanical energy is called as

Question # 20

An emf is set up in a conductor when it

Question # 21

The phenomenon of generation of induced emf is called:

Question # 22

Referring to above figure, due to change in current in the coil P, the change in magnetic flux:

Question # 23


The magnitude of induced emf depends upon the:

Question # 24

Back emf is produced due to

Question # 25

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when

Question # 26

Which of the following quantities remain constant in step up transformer?

Question # 27

The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called

Question # 28

Michael Faraday and Joseph Henry belong respectively to

Question # 29

What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10-2Wb, and change in current is 0.01 A?

Question # 30

A.C. can be measure with the help of

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current
A. Of same magnitude in the same direction
B. Of different magnitude in the same direction
C. Of same magnitude but in opposite direction
D. Of different magnitude in the opposite direction
2 The product of induced current and the resistance of the wire through which the current is passing is called:
A. Electromagnetic induction
B. induced emf
C. Induced current
D. Self induced
3 Referring to above figure, a changing current in coil P can be produced:
A. At the instant the switch is closed
B. At the instant the switch is opened
C. With the help of rheostat
D. All of these
4

An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic field
D. Constant electric field
5 When a conductor moved with its length parallel to the lines of magnetic fled:
A. An emf is induced across its ends
B. Emf induced is similar to that of a battery
C. Emf passes through the conductor
D. Both A and B
6 An induced current can be produced by
A. Constant magnetic field
B. Changing magnetic field
C. Varying electric field
D. Constant electric field
7 When a conductoris moved across a magnetic field:
A. Emf induced its similar to that of a battery
B. Emf induced gives rise to induced current
C. An emf is induced across its ends
D. All are correct
8 Lenz's law is the consequence of
A. Mass
B. Energy conservation
C. Momentum conservation
D. Charge
9 Motional emf is called motional:
A. Electromagnetic force and is measured in newtons
B. Electromotive force and is measured in volt
C. Electromotive force and is measured in newtons
D. Electromagnetic force and is measured in volts
10 The magnitude of induced emf depends upon the
A. Rate of decrease of magnetic field
B. Rate of change of magnetic field
C. Rate of increase of magnetic flux
D. Constancy of magnetic field

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