ECAT Pre Engineering Physics Chapter 15 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction

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Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction

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Question # 1

Back emf is produced due to

Question # 2

The induced current in the loop can be increased by:

Question # 3

In magnet-coil experiment, emf can be produced by

Question # 4

The product of induced current and the resistance of the wire through which the current is passing is called:

Question # 5

Split rings act as

Question # 6

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

Question # 7

The phenomenon of generation of induced emf is called:

Question # 8

Lens's law deals with the

Question # 9

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

Question # 10

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current

Question # 11

The SI unit of magnetic induction is

Question # 12

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

Question # 13

A device which converts Electrical energy into mechanical energy is called as

Question # 14

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

Question # 15

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

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Sr.# Question Answer
1 An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic feild
D. Constant electric field
2 The induced current in the loop can be Increased by
A. Using a stronger magnetic field
B. Moving the loop faster
C. Replacing the loop by a coil of many turns
D. All above
3 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
4 Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current:
A. Of same magnitude in the same direction
B. Of different magnitude in the same direction
C. Of same magnitude but in opposite direction
D. Of different magnitude in the opposite direction
5 A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:
A. The coil is destroyed
B. The coil is Rotated
C. The coil is neither destroyed nor rotated
D. Both (A) and (B)
6 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
7 The SI unit of magnetic induction is
A. Weber
B. Weber/meter
C. Henry
D. Tesla
8 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
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 A.C. can be measure with the help of
A. Nuclear effect
B. Magnetic effect
C. Chemical effect
D. Heating effect

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