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 the conductor moved across a magnetic field:

Question # 2

Transformer is used to

Question # 3

In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is:

Question # 4

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

Question # 5

The magnitude of induced emf depends upon the

Question # 6

A.C. can be measure with the help of

Question # 7

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

Question # 8

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

Question # 9

Referring to above figure, current in coil P falls from its maximum value to zero:

Question # 10

Back emf is produced due to

Question # 11

An emf is set up in a conductor when it:

Question # 12

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

Question # 13

Michael Faraday and Joseph Henry belong respectively to

Question # 14

Lens's law deals with the

Question # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 When a conductoris moved across a magnetic field:
A. Emf induced its similar to that of a battery
B. Emf induced gives rise to induced current
C. An emf is induced across its ends
D. All are correct
4 Split rings act as
A. Vibrator
B. Resistor
C. Motor
D. Commulator
5 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
6 Which of the following is most suitable as the core of transformer
A. Soft iron
B. Alinco
C. Steel
D. None of these
7 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)
8 An induced current can be produced by
A. Constant magnetic field
B. Changing magnetic field
C. Varying electric field
D. Constant electric field
9 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
10 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

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