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

Question # 2

The induced current in the loop can be increased by:

Question # 3

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

Question # 4

The direction of induced current is always so as to oppose the cause which produces it. This is

Question # 5

Micheal Faraday and joseph Henry belong respectively to:

Question # 6

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

Question # 7

Faraday's law of electromagnetic induction has been used in the construction of:

Question # 8

Michael Faraday and Joseph Henry belong respectively to

Question # 9

A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:

Question # 10

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

Question # 11

The rate change of area expressed is expressed in:

Question # 12

Self inducede e.m.f. is also called

Question # 13

Which of the following quantities remain constant in step up transformer?

Question # 14

A.C. can be measure with the help of

Question # 15

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?

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 Transformer is used to
A. Increase alternating current
B. Increase d.c voltage
C. Increase & Decrease emf
D. All answers are right
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 A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:
A. Zero
B. Of smaller magnitude
C. Of larger magnitude
D. Sometimes B, sometimes C
4 Micheal Faraday and joseph Henry belong respectively to:
A. USA and England
B. England and France
C. England and USA
D. USA and France
5 A.C. can be measure with the help of
A. Nuclear effect
B. Magnetic effect
C. Chemical effect
D. Heating effect
6 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
7 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
8 Referring to above figure, due to change in current in the coil P, the change in magnetic flux
A. Is associated with coil P
B. Is associated with coil S
C. Causes and induced current in coil S
D. All of these
9 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
10 In magnet-coil experiment, emf can be produced by:
A. Keeping the coil stationary and moving the magnet
B. Keeping the magnet stationary and moving the coil
C. Relative motion of the loop and magnet
D. Any one of above

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