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

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

Question # 2

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 # 3

The induced current in a conductor depends upon:

Question # 4

The induced current is a conductor depends upon:

Question # 5

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 # 6

The induced current in the loop can be Increased by

Question # 7

Micheal Faraday and joseph Henry belong respectively to:

Question # 8

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

Question # 9

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

Question # 10

When a conductoris moved across a magnetic field:

Question # 11

Eddy current is produced when:

Question # 12

A.C. can be measure with the help of

Question # 13

The phenomenon of generation of induced emf is called

Question # 14

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

Question # 15

Transformer is used to

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 Transformer is used to
A. Increase alternating current
B. Increase d.c voltage
C. Increase & Decrease emf
D. All answers are right
3
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
4 Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:
A. 45 V
B. 15 V
C. 90 V
D. 300 V
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 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)
7 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
8 The induced current in 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
9 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
10 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

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