Second Year Physics Chapter 15 Online MCQ Test for 2nd Year Physics Chapter 15 Electromagnetic Induction Preparation

FSC Part 2 Physics
Chapter 15 Test

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Physics FSC Part 2 Chapter 15 Online MCQ's Test

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Question # 1

When the back emf is zero, its draws.

Question # 2

If 10 A current passes through 100 mH inductor, then energy stored is.

Question # 3

Induced emf in A.C. generator can be increased by

Question # 4

The negative sign with induced emf in Faraday's law is in accordance with

Question # 5

With the speed of motor, magnitude of back emf

Question # 6

In D.C. generator, split rings act as.

Question # 7

What is the co-efficient of mutual inductance, when the magnetic flux changes by 2 x 10-2 Wb, and change in current is 0.01 A?

Question # 8

Energy stored in an inductor is:

Question # 9

In case of inductor , energy is stored in the

Question # 10

The unit of induced emf is

Question # 11

The mutual inductance of the coils depends upon.

Question # 12

The direction of induced current is always so as to oppose the change which causes the current is:

Question # 13

A real transformer does not change.

Question # 14

B2/2p is the expression of.

Question # 15

A simple device that prevents the direction of current from changing is called.

Question # 16

If we make magnetic field stronger the value of induced current is.

Question # 17

When back emf in motor is zero, it draws.

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Eddy current is produced when:
A. A metal is light 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 circualr coil
2 A.C. Generator based upon the
A. Lenz's law
B. Maxwell's relation
C. Faradays law of electromagnet induction
D. Mutual induction
3 The illustration of the phenomenon of mutual induction is in the device of
A. Transformer
B. Inductor
C. A.C. Generator
D. Ammeter
4 The Lenz's law fulfils.
A. Law of conservation of energy
B. Law of conservation of charge
C. Law of conservation of momentum
D. Kirchhoff's law
5 The winding of the electromagnet in motor are usually called.
A. Magnetic coils
B. Field coils
C. Electric coils
D. electric o electric coils
6 If the north pole of a magnet moves away from a metallic ring
A. Clockwise
B. Anticlockwise
C. First clockwise and then anticlockwise
D. None of above
7 Induced emf in A.C. generator can be increased by
A. Decreasing area of coil
B. Decreasing magnetic field
C. Increasing area of coil
D. Slowing down speed of coil
8 EMF is induced due to change in
A. Charge
B. Current
C. Magnetic flux
D. Electric field
9 DC generator by william Sturgeon in:
A. 1894
B. 1961
C. 1834
D. 1961
10 What is the co-efficient of mutual inductance, when the magnetic flux changes by 2 x 10-2 Wb, and change in current is 0.01 A?
A. 2 H
B. 3 H
C. 1/2 H
D. Zero

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