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

Transformer is used to

Question # 2

When there is no relative motion between the magnet and coil, the galvanometer indicated

Question # 3

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

Question # 4

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

Question # 5

The induced current in a conductor depends upon:

Question # 6

A device which converts Electrical energy into mechanical energy is called as

Question # 7

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

Question # 8

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

Question # 9

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 # 10

The induced emf in a coil is proportional to:

Question # 11

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

Question # 12

The SI unit of magnetic induction is

Question # 13

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

Question # 14

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

Question # 15

An induced current can be produced by:

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:
A. The coil is destroyed
B. The coil is Rotated
C. The coil is neither destroyed nor rotated
D. Both (A) and (B)
2 The motional e.m.f depends upon the
A. Length of a conductor
B. Strength of a magnet
C. Speed of the conductor
D. All of the above
3 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
4 Lenz's law is the consequence of
A. Mass
B. Energy conservation
C. Momentum conservation
D. Charge
5 The unit of induced emf is:
A. Volt
B. Nm/As
C. Joule coul-1
D. Both A and C
6 Transformer is used to
A. Increase alternating current
B. Increase d.c voltage
C. Increase & Decrease emf
D. All answers are right
7 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)
8 A.C. can be measure with the help of
A. Nuclear effect
B. Magnetic effect
C. Chemical effect
D. Heating effect
9 When a conductor is moved across a magnetic field, the redistribution of charge sets up:
A. Magnetic field
B. Electrostatic field
C. Electromagnetic field
D. All of these
10 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 an induced current is coil S
D. All of these

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