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

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

Question # 2

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

Question # 3

The phenomenon of generation of induced emf is called:

Question # 4

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:

Question # 5

Motional emf is called motional:

Question # 6

Back emf is produced due to

Question # 7

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

Question # 8

The phenomenon of generation of induced emf is called

Question # 9

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

Question # 10

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

Question # 11

The induced emf in a coil is proportional to:

Question # 12

Michael Faraday and Joseph Henry belong respectively to

Question # 13

The unit of induced emf is:

Question # 14

The rate change of area expressed is expressed in:

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 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
2 For inducting emf in a coil the basic requirement is that:
A. Flux should link the coil
B. Change in flux should link the coil
C. Coil should form a closed loop
D. Both B and C are true
3 The unit of induced emf is:
A. Volt
B. Nm/As
C. Joule coul-1
D. Both A and C
4 The law of electromagnetic induction is related to:
A. Coulomb
B. Ampere
C. Faraday
D. Lenz
5 The induced current in the loop can be increased by:
A. Using a strong magnetic field
B. Moving the loop faster
C. Replacing the loop by a coil of many turns
D. All of above
6 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
7 Michael Faraday and Joseph Henry belong respectively to
A. USA and England
B. England and France
C. England and USA
D. USA and France
8 Back emf is produced due to
A. Self induction
B. Mutual induction
C. A.C
D. Lenz's law
9 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
10 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

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