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

In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is:

Question # 2

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

Question # 3

A device which converts Electrical energy into mechanical energy is called as

Question # 4

The work is stored in the inductor as

Question # 5

In magnet-coil experiment, emf can be produced by

Question # 6

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

Question # 7

Motional emf is called motional:

Question # 8

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

Question # 9

The rate change of area expressed is expressed in:

Question # 10

The SI unit of magnetic induction is

Question # 11

The induced current in a conductor depends upon:

Question # 12

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

Question # 13

An induced current can be produced by

Question # 14

An induced current can be produced by:

Question # 15

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

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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 Which of the following is most suitable as the core of transformer
A. Soft iron
B. Alinco
C. Steel
D. None of these
3 Back emf is produced due to
A. Self induction
B. Mutual induction
C. A.C
D. Lenz's law
4 The practical application of the phenomenon of Mutual induction is
A. Transformers
B. Generator
C. Motor
D. All of these
5 The direction of induced current is always so as to oppose the cause which produces it. This is
A. Lenz's law
B. Ampere's law
C. Faraday's law
D. Coulomb's law
6 The induced current in 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
7 The product of induced current and the resistance of the wire through which the current is passing is called:
A. Electromagnetic induction
B. induced emf
C. Induced current
D. Self induced
8 A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:
A. The coil is destroyed
B. The coil is Rotated
C. The coil is neither destroyed nor rotated
D. Both (A) and (B)
9 The Phenomenon of generation of induced emf is called
A. Electrostatic induction
B. Magnetic induction
C. Electromagnetic induction
D. Electric induction
10 Referring to above figure, current in the coil P grows from zero to its maximum value
A. At the instant the switch is closed
B. At the instant the switch is opened
C. When switch is kept open
D. All of above

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