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

Question # 2

An emf is set up in a conductor when it:

Question # 3

An emf is set up in a conductor when it

Question # 4

Transformer is used to

Question # 5

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

Question # 6

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 # 7

The phenomenon of generation of induced emf is called:

Question # 8

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

Question # 9

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

Question # 10

An induced current can be produced by:

Question # 11

The magnitude of induced emf depends upon the:

Question # 12

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

Question # 13

The magnitude of induced emf depends upon the

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 Eddy current is produced when:
A. A metal is kept in varying magnetic field
B. A metal is kept in steady magnetic field
C. A circular coil is placed in a steady magnetic field
D. A current is passed through a circular coil
2

An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic field
D. Constant electric field
3 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?
A. 2 H
B. 3 H
C. 1/2 H
D. Zero
4 The phenomenon of generation of induced emf is called:
A. Electrostatic induced
B. Magnetic induced
C. Electromagnetic induced
D. Electric induced
5 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
6 When the conductor moved across a magnetic field:
A. Emf induced is similar to that of a battery

B. Emf induced gives rise to induced current

C. An emf induced across its ends

D. All are correct
7 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
8 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
9 Which of the following is most suitable as the core of transformer
A. Soft iron
B. Alinco
C. Steel
D. None of these
10
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

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