ECAT Pre Engineering Physics Chapter 15 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction

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Physics ECAT Pre Engineering 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

The SI unit of magnetic induction is

Question # 3

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

Question # 4

The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called

Question # 5

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

Question # 6

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

Question # 7

The phenomenon of generation of induced emf is called:

Question # 8

Micheal Faraday and joseph Henry belong respectively to:

Question # 9

The induced current in a conductor depends upon:

Question # 10

The induced current in the loop can be Increased by

Question # 11

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

Question # 12

In magnet-coil experiment, emf can be produced by

Question # 13

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

Question # 14

The work is stored in the inductor as

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

An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic field
D. Constant electric field
2 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
3 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
4 Motional emf is called motional:
A. Electromagnetic force and is measured in newtons
B. Electromotive force and is measured in volt
C. Electromotive force and is measured in newtons
D. Electromagnetic force and is measured in volts
5 An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic field
D. Constant electric field
6 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
7 The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called
A. Mutual induction
B. Mutual inductance
C. Capacitance
D. Self inductance
8 Back emf is produced due to
A. Self induction
B. Mutual induction
C. A.C
D. Lenz's law
9 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
10 The practical application of the phenomenon of Mutual induction is
A. Transformers
B. Generator
C. Motor
D. All of these

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