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 motional e.m.f depends upon the

Question # 2

The induced current in the loop can be Increased by

Question # 3

The work is stored in the inductor as

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

The induced current in a conductor depends upon

Question # 10

Self inducede e.m.f. is also called

Question # 11

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

Question # 12

An induced current can be produced by:

Question # 13

Lenz's law is the consequence of

Question # 14

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

Question # 15

Split rings act as

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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 The unit of induced emf is:
A. Volt
B. Nm/As
C. Joule coul-1
D. Both A and C
4 Referring to above figure, current in coil P falls from its maximum value to zero:
A. At the instant the switch is closed
B. At the instant the switch is opened
C. When switch is kept open
D. When switch is kept closed
5 The induced emf in a coil is proportional to:
A. Magnetic flux through a coil
B. Rate of change of magnetic flux through the coil
C. Area of the coil
D. Product of magnetic flux and area of the coil
6 Back emf is produced due to
A. Self induction
B. Mutual induction
C. A.C
D. Lenz's law
7 Lenz's law is the consequence of
A. Mass
B. Energy conservation
C. Momentum conservation
D. Charge
8
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
9 A.C. can be measure with the help of
A. Nuclear effect
B. Magnetic effect
C. Chemical effect
D. Heating effect
10 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy

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