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

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

Question # 2

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

Question # 3

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

Question # 4

The phenomenon of generation of induced emf is called:

Question # 5

An emf is set up in a conductor when it:

Question # 6

When a conductoris moved across a magnetic field:

Question # 7

The induced emf in a coil is proportional to:

Question # 8

The induced current is a conductor depends upon:

Question # 9

The induced current in the loop can be increased by:

Question # 10

The rate change of area expressed is expressed in:

Question # 11

The magnitude of induced emf depends upon the:

Question # 12

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 # 13

In magnet-coil experiment, emf can be produced by

Question # 14

The law of electromagnetic induction is related to:

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 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 Transformer is used to
A. Increase alternating current
B. Increase d.c voltage
C. Increase & Decrease emf
D. All answers are right
3 The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called
A. Mutual induction
B. Mutual inductance
C. Capacitance
D. Self inductance
4 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
5 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
6 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
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 In magnet-coil experiment, emf can be produced by:
A. Keeping the coil stationary and moving the magnet
B. Keeping the magnet stationary and moving the coil
C. Relative motion of the loop and magnet
D. Any one of above
9 The phenomenon of generation of induced emf is called
A. Electrostatic induction
B. Magnetic induction
C. Electromagnetic induction
D. Electric induction
10 The induced current in the loop can be increased by:
A. Using a strong magnetic field
B. Moving the loop faster
C. Replacing the loop by a coil of many turns
D. All of above

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