2nd Year Physics Chapter 15 Online MCQ Test for 12th Class Physics Chapter 15 (Electromagnetic Induction)

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MCQ's Test For Chapter 0 "Physics ICS Part 2 Chapter 15 Online MCQ's Test"

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Physics ICS Part 2 Chapter 15 Online MCQ's Test

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Question # 1

The magnitude of back emf:

Question # 2

Unit of self inductance is

Question # 3

The rod of unit length is moving at 30 o through a magnetic field of 1 T. If the velocity of rod is 1 m/s, then induced emf in the rod will be given by

Question # 4

When back emf in motor is zero, it draws.

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Energy density in an inductor is.

Question # 10

Energy stored in inductor is.

Question # 11

The device in the circuit that consume electrical energy are known as.

Question # 12

The unit of induced emf is

Question # 13

If a step up transformer were 100% efficient the primary and secondary winging's would have the same.

Question # 14

Eddy current is produced when:

Question # 15

A metal rod of 1 m is moving at a speed of 1 ms-1 in a direction making an angle 30 o with 0.5 T magnetic field . The emf produced is.

Question # 16

The magnitude of motional emf is given by

Question # 17

If the coil is wound on iron core, the flux through it.

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The induction can be increased by winding the wire around a core made of.
A. Copper
B. Silicon
C. Iron
D. Aluminum
2 If force in the direction of velocity of conductor,  then induced current is directed,
A. Anti clockwise
B. Clock wise
C. At equilibrium
D. None of above
3 Mutual induction has a practical role in the performance of the.
A. Radio choke
B. Transformers
C. A.C. Generator
D. D.C. Generator
4 Electromagnetic induction obeys law of conservation
A. Charge
B. Energy
C. Momentum
D. Mass
5 Energy stored in inductor is.
A. 1/2 L I2
B. 1/2 LI
C. 1/2 L2I
D. 1/2 L2I2
6 The mutual inductance between two coils depends upon their
A. Size
B. Core material
C. Size, core material and separation
D. Separation
7 The magnitude of back emf:
A. Increases with sped of motor
B. Decreases with speed of motor
C. Remains same 
D. None of above
8 Output of D.C. motor is
A. A.C. energy
B. Mechanical energy
C. Chemical energy
D. D.C. energy
9 When the back emf is zero, its draws.
A. Zero current
B. Minimum current
C. Maximum current
D. Steady current
10 When the back emf in a current is zero, it draws
A. Zero current
B. Maximum current
C. Minimum current
D. Steady average current

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