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

Lenz's law is the consequence of

Question # 2

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

Question # 3

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

Question # 4

An induced current can be produced by:

Question # 5

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 # 6

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

Question # 7

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

Question # 8

A.C. can be measure with the help of

Question # 9

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

Question # 10

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

Question # 11

An induced current can be produced by:

Question # 12

An induced current can be produced by

Question # 13

The rate change of area expressed is expressed in:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 An emf is set up in a conductor when it
A. Is kept in a magnetic field
B. Is kept in an electric field
C. Moves across a magnetic field
D. Both A and B
2 The unit of induced emf is:
A. Volt
B. Nm/As
C. Joule coul-1
D. Both A and C
3 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
4 The change of magnetic flux through a circuit will produce
A. Magnetic Field
B. Electric Field
C. emf
D. a.c
5 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
6 When there is no relative motion between the magnet and coil, the galvanometer indicates:
A. No current in circuit
B. An increasing current
C. A decreasing current
D. Either B or C
7 Lens's law deals with the
A. Magnitude of induced current
B. Magnitude of induced e.m.f
C. Direction of induced e.m.f
D. Direction of induced current
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 An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic feild
D. Constant electric field
10 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

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