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

The current produced by moving a loop of a wire across a magnetic field is called:

Question # 2

The rate change of area expressed is expressed in:

Question # 3

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current

Question # 4

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

Question # 5

The magnitude of induced emf depends upon the

Question # 6

Transformer is used to

Question # 7

An induced current can be produced by

Question # 8

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

Question # 9

The unit of induced emf is:

Question # 10

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

Question # 11

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

Question # 12

Self inducede e.m.f. is also called

Question # 13

The product of induced current and the resistance of the wire through which the current is passing is called:

Question # 14

The current produced by moving a loop of wire across a magnetic field is called

Question # 15

The direction of induced current is always so as to oppose the cause which produces it. This is

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 The SI unit of magnetic induction is
A. Weber
B. Weber/meter
C. Henry
D. Tesla
3 In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is:
A. 0.2 henry
B. 0.1 henry
C. 0.8 henry
D. 0.04 henry
4 Referring to above figure, current in coil P falls from its maximum value to zero:
A. At the instant the switch is closed
B. At the instant the switch is opened
C. When switch is kept open
D. When switch is kept closed
5 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
6 Micheal Faraday and joseph Henry belong respectively to:
A. USA and England
B. England and France
C. England and USA
D. USA and France
7 A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:
A. The coil is distorted
B. The coil is rotated
C. The coil is neither distorted nor rotated
D. Both A and B
8 The current produced by moving a loop of wire across a magnetic field is called:
A. Direct current
B. Magnetic current
C. Alternating current
D. Induced current
9 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
10 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

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