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

Motional emf is called motional:

Question # 2

Micheal Faraday and joseph Henry belong respectively to:

Question # 3

The induced current in the loop can be increased by:

Question # 4

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

Question # 5

In magnet-coil experiment, emf can be produced by:

Question # 6

Michael Faraday and Joseph Henry belong respectively to

Question # 7

In magnet-coil experiment, emf can be produced by:

Question # 8

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

Question # 9


The magnitude of induced emf depends upon the:

Question # 10

When the conductor moved across a magnetic field:

Question # 11

An emf is set up in a conductor when it

Question # 12

The magnitude of induced emf depends upon the:

Question # 13

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

Question # 14

Self inducede e.m.f. is also called

Question # 15

The practical application of the phenomenon of Mutual induction is

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 Referring to above figure, due to change in current in the coil P, the change in magnetic flux
A. Is associated with coil P
B. Is associated with coil S
C. Causes and induced current in coil S
D. All of these
5 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
6 When there is no relative motion between the magnet and coil, the galvanometer indicated
A. No current in the circuit
B. An increasing current
C. A decreasing current
D. A constant current
7 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
8 Which of the following quantities remain constant in step up transformer?
A. Current
B. Voltage
C. Power
D. Heat
9 A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when
A. The coil is distorted
B. The coil is rotated
C. The coil is neither distorted nor rotated
D. Both A and B
10 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

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