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

The motional e.m.f depends upon the

Question # 2

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 # 3

Self inducede e.m.f. is also called

Question # 4

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

Question # 5

For inducting emf in a coil the basic requirement is that:

Question # 6

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 # 7

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

Question # 8

Motional emf is called motional:

Question # 9

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

Question # 10

An induced current can be produced by

Question # 11

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

Question # 12

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 # 13

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

Question # 14

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:

Question # 15

The induced current in the loop can be Increased by

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
2 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
3 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
4 Michael Faraday and Joseph Henry belong respectively to
A. USA and England
B. England and France
C. England and USA
D. USA and France
5 An emf is set up in a conductor when it
A. Is kept in a magnetic field
B. Is kept in an electric field
C. Moves across a magnetic field
D. Both A and B
6 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)
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 The change of magnetic flux through a circuit will produce
A. Magnetic Field
B. Electric Field
C. emf
D. a.c
9 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
10 When a conductoris moved across a magnetic field:
A. Emf induced its similar to that of a battery
B. Emf induced gives rise to induced current
C. An emf is induced across its ends
D. All are correct

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