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

Lenz's law presented in

Question # 2

split rings are used in

Question # 3

Self induction does not depend on

Question # 4

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

Question # 5

The magnitude of back emf:

Question # 6

Energy density of an inductor is:

Question # 7

In A.C. inductor behaves as

Question # 8

The unit of induced emf is

Question # 9

When a motor is over loaded then the magnitude of back emf.

Question # 10

The emf induced by the motion of a conductor across a magnetic field is called:

Question # 11

Step up transformer is used.

Question # 12

If magnetic field is doubled then magnetic energy density becomes.

Question # 13

Transformer is used to change

Question # 14

Self inductance of a long solenoid is given by

Question # 15

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

Question # 16

A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.

Question # 17

DC generator by william Sturgeon in:

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FSC Part 2 Physics Chapter 15 Online Test MCQ's

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The jerks in D.C. motor are created by the use of.
A. Armature
B. Commutators
C. Split rings
D. Source of emf
2 The direction of induced current is always so as to oppose the change which causes the current is:
A. Faraday's law
B. Lenz's  law
C. Ohm's law
D. Kirchhoff's 1st rule
3 A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.
A. 0.1 J
B. 10 J
C. 100 J
D. 1000 J
4 The magnitude of back emf:
A. Increases with sped of motor
B. Decreases with speed of motor
C. Remains same 
D. None of above
5 For step down transformer
A. Ns>Np
B. Np > Ns
C. Ns = Np
D. Ns > > > Np
6 A current generator device converts:
A. Mechanical energy into chemical energy
B. Chemical energy into electrical energy
C. Mechanical energy into electrical energy
D. Both b and c
7
Question Image
A. Lenz's law
B. Faraday's law
C. Ampere's law
D. None of these
8 Which one is not present in A.C. generator.
A. Armature
B. Magnet
C. Slip rings
D. Commutator
9 In self induction A coil is connected in__________ with battery and a rheostat.
A. Parallel
B. Series
C. Both A and B
D. None of above
10 The winding of the electromagnet in motor are usually called.
A. Magnetic coils
B. Field coils
C. Electric coils
D. electric o electric coils

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