ECAT Pre Computer Science Chapter 15 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 15 Electromagnetic Induction

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

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ECAT Physics Chapter 15 Electromagnetic Induction

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Question # 1

Which of the following is most suitable as the core of transformer

Question # 2

Referring to above figure, a changing current in coil P can be produced:

Question # 3

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

Question # 4

An emf is set up in a conductor when it

Question # 5

The phenomenon of generation of induced emf is called

Question # 6

In magnet-coil experiment, emf can be produced by:

Question # 7

An induced current can be produced by:

Question # 8

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

Question # 9

An induced current can be produced by:

Question # 10

Plan of a coil makes an angle of 20º with the lines of magnetic field. The angle between B and vector area of plane of coil is:

Question # 11

Motional emf is called motional:

Question # 12

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

Question # 13

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

Question # 14

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 # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 For inducting emf in a coil the basic requirement is that:
A. Flux should link the coil
B. Change in flux should link the coil
C. Coil should form a closed loop
D. Both B and C are true
2 The change of magnetic flux through a circuit will produce
A. Magnetic Field
B. Electric Field
C. emf
D. a.c
3 Referring to above figure, current in the coil P grows from zero to its maximum value:
A. At the instant the switch is closed
B. At the instant the switch is opened
C. When switch is kept open
D. All of above
4 When the conductor moved across a magnetic field:
A. Emf induced is similar to that of a battery

B. Emf induced gives rise to induced current

C. An emf induced across its ends

D. All are correct
5 When a conductor is moved across a magnetic field, the redistribution of charge sets up:
A. Magnetic field
B. Electrostatic field
C. Electromagnetic field
D. All of these
6 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
7 The induced current is a conductor depends upon:
A. Resistance of the loop
B. Speed with which the conductor moves
C. Any of these
D. Both (A) and (B)
8 The current produced by moving a loop of a wire across a magnetic field is called:
A. Direct current
B. Magnetic current
C. Alternating current
D. Induced current
9 Eddy current is produced when:
A. A metal is kept in varying magnetic field
B. A metal is kept in steady magnetic field
C. A circular coil is placed in a steady magnetic field
D. A current is passed through a circular coil
10 The Phenomenon of generation of induced emf is called
A. Electrostatic induction
B. Magnetic induction
C. Electromagnetic induction
D. Electric induction

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