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

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

Question # 2

The magnitude of induced emf depends upon the

Question # 3

The induced current in the loop can be increased by:

Question # 4

An emf is set up in a conductor when it:

Question # 5

The law of electromagnetic induction is related to:

Question # 6

The work is stored in the inductor as

Question # 7

In magnet-coil experiment, emf can be produced by

Question # 8

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

Question # 9

The rate change of area expressed is expressed in:

Question # 10

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

Question # 11

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

Question # 12

Lenz's law is the consequence of

Question # 13

The phenomenon of generation of induced emf is called:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 An emf is set up in a conductor when it:
A. Is kept in a magnetic field
B. Is kept in an electric field
C. Moves across a magnetic field
D. Both A and B
2 Referring to above figure, a changing current in coil P can be produced:
A. At the instant the switch is closed
B. At the instant the switch is opened
C. With the help of rheostat
D. All of these
3 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
4 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
5
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
6 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
7 Self inducede e.m.f. is also called
A. Motional e.m.f.
B. Thermistor
C. Electrostatic induction
D. Back e.m.f
8 Which of the following quantities remain constant in step up transformer?
A. Current
B. Voltage
C. Power
D. Heat
9 The unit of induced emf is:
A. Volt
B. Nm/As
C. Joule coul-1
D. Both A and C
10 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

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