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

An emf is set up in a conductor when it:

Question # 2

Lenz's law is the consequence of

Question # 3

The unit of induced emf is:

Question # 4

An induced current can be produced by:

Question # 5

When a conductor is moved across a magnetic field, the redistribution of charge sets up:

Question # 6

In magnet-coil experiment, emf can be produced by

Question # 7

The magnitude of induced emf depends upon the:

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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:

Question # 12

The induced current in the loop can be Increased by

Question # 13

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

Question # 14

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

Question # 15

The induced current in the loop can be increased by:

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 The current produced by moving a loop of a wire across a magnetic field is called:
A. Direct current
B. Magnetic current
C. Alternating current
D. Induced current
2 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
3 In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:
A. Both A and C
B. Induced emf
C. Both A and B
D. Motion emf
4 Split rings act as
A. Vibrator
B. Resistor
C. Motor
D. Commulator
5 The induced current is 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)
6 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
7 An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic field
D. Constant electric field
8 Which of the following quantities remain constant in step up transformer?
A. Current
B. Voltage
C. Power
D. Heat
9 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
10 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

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