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

The law of electromagnetic induction is related to:

Question # 2

An emf is set up in a conductor when it:

Question # 3

An induced current can be produced by:

Question # 4

Back emf is produced due to

Question # 5

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

Question # 6

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 # 7

The induced current in the loop can be increased by:

Question # 8

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

Question # 9

Which of the following is most suitable as the core of transformer

Question # 10

The SI unit of magnetic induction is

Question # 11

Motional emf is called motional:

Question # 12

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

Question # 13

The induced emf in a coil is proportional to:

Question # 14

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

Question # 15

Lenz's law is the consequence of

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 Self inducede e.m.f. is also called
A. Motional e.m.f.
B. Thermistor
C. Electrostatic induction
D. Back e.m.f
2
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
3 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)
4 The phenomenon of generation of induced emf is called
A. Electrostatic induction
B. Magnetic induction
C. Electromagnetic induction
D. Electric induction
5 Micheal Faraday and joseph Henry belong respectively to:
A. USA and England
B. England and France
C. England and USA
D. USA and France
6 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
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 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
9 An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic feild
D. Constant electric field
10 The change of magnetic flux through a circuit will produce
A. Magnetic Field
B. Electric Field
C. emf
D. a.c

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