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

Self inducede e.m.f. is also called

Question # 2

Lens's law deals with the

Question # 3

Michael Faraday and Joseph Henry belong respectively to

Question # 4

When a conductoris moved across a magnetic field:

Question # 5

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

Question # 6

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

Question # 7

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current:

Question # 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?

Question # 9

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

Question # 10

The magnitude of induced emf depends upon the:

Question # 11

When a conductor moved with its length parallel to the lines of magnetic fled:

Question # 12

Eddy current is produced when:

Question # 13

The change of magnetic flux through a circuit will produce

Question # 14

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 # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 When the conductor moved across a magnetic field:
A. Emf induced is similar to that of a battery

B. Emf induced gives rise to induced current

C. An emf induced across its ends

D. All are correct
2 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
3 The induced current in the loop can be Increased by
A. Using a stronger magnetic field
B. Moving the loop faster
C. Replacing the loop by a coil of many turns
D. All above
4 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:
A. 0.2 henry
B. 0.1 henry
C. 0.8 henry
D. 0.04 henry
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 A metal road of length 1m is moving at a speed of 1 ms-1In a direction making angle of 30º with 0.5 Y magnetic field. The emf produced in the rod is:
A. 0.25 N
B. 0.25 V
C. 2.5 V
D. 2.5 N
7 Lens's law deals with the
A. Magnitude of induced current
B. Magnitude of induced e.m.f
C. Direction of induced e.m.f
D. Direction of induced current
8 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
9 An induced current can be produced by
A. Constant magnetic field
B. Changing magnetic field
C. Varying electric field
D. Constant electric field
10 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

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