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 induced current in a conductor depends upon

Question # 2

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

Question # 3

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

Question # 4

The induced current in the loop can be increased by:

Question # 5

Split rings act as

Question # 6


The magnitude of induced emf depends upon the:

Question # 7

The induced current in a conductor depends upon:

Question # 8

The induced current in the loop can be Increased by

Question # 9

Back emf is produced due to

Question # 10

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 # 11

A metal road of length 1m is moving at a speed of 1 ms-1In a direction making angle of 30º with 0.5 Y magnetic field. The emf produced in the rod is:

Question # 12

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

Question # 13

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

Question # 14

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 # 15

Motional emf is called motional:

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
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 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
4 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
C. Relative motion of the loop and magnet
D. Any one of above
5 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
6 The induced emf in a coil is proportional to:
A. Magnetic flux through a coil
B. Rate of change of magnetic flux through the coil
C. Area of the coil
D. Product of magnetic flux and area of the coil
7 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
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 rate change of area expressed is expressed in:
A. None of these
B. ms-1
C. m2s-2
D. ms-2
10 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

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