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

A.C. can be measure with the help of

Question # 2

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 # 3

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

Question # 4

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

Question # 5

The unit of induced emf is:

Question # 6

An emf is set up in a conductor when it:

Question # 7

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

Question # 8

Transformer is used to

Question # 9

Lens's law deals with the

Question # 10

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

Question # 11

When a conductor moved with its length parallel to the lines of magnetic fled:

Question # 12

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

Question # 13

The work is stored in the inductor as

Question # 14

When there is no relative motion between the magnet and coil, the galvanometer indicated

Question # 15

An emf is set up in a conductor when it

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 The SI unit of magnetic induction is
A. Weber
B. Weber/meter
C. Henry
D. Tesla
2
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
3 The device in which induced emf is statically induced emf is:
A. Transformer
B. AC generator
C. Alternator
D. Dynamo
4 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
5 Referring to above figure, due to change in current in the coil P, the change in magnetic flux:
A. Is associated with coil P
B. Is associated with coil S
C. Causes an induced current is coil S
D. All of these
6 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
7 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
8 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:
A. Also 20º

B. 70º

C. 90º

D. 180º
9 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
10 Transformer is used to
A. Increase alternating current
B. Increase d.c voltage
C. Increase & Decrease emf
D. All answers are right

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