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

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

Question # 2

Step up transformer is used.

Question # 3

The north pole of a magnet is brought near a metallic ring. The direction of induced current in the ring will be:

Question # 4

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 # 5

Output of D.C. motor is

Question # 6

SI unit of hennery which is.

Question # 7

In a coil current change from 2 to 4 A in .05 s . If the average induced emf is 8 V then coefficient of self-inductance is:

Question # 8

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 # 9

When motor is just started, back emf is almost.

Question # 10

If force in the direction of velocity of conductor,  then induced current is directed,

Question # 11

The Lenz's law fulfils.

Question # 12

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

Question # 13

By winding the coil around a less magnetic core, self induction.

Question # 14

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

Question # 15

The unit of induced emf is

Question # 16

A step up transformer is used 120 V line to provide 240 V. If primary coil has 100 turns the number of turns is secondary is.

Question # 17

The only difference between the construction of D.C and A.C is.

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 1 Henry =
A. VSA-1
B. VS-1A-1
C. V-1SA
D. VSA-2
2 If magnetic field is doubled then magnetic energy density becomes.
A. Four times
B. Two times
C. Three times
D. Six times
3 Eddy current is one cause energy loss in
A. A.C. generator
B. Transformer
C. D.C. motor
D. D.C. generator
4 When the back emf in a current is zero, it draws
A. Zero current
B. Maximum current
C. Minimum current
D. Steady average current
5 Transformer is used to change
A. Electric power
B. Magnetic field
C. Alternating voltage
D. Phase of A.C.
6 Self induction does not depend on
A. Number of turns of the coil
B. Area of cross section of the core
C. Nature of material of the core
D. Current through inductor
7 Mutual induction play role in.
A. Generator
B. D.C. motor
C. Galvanometer
D. Transformer
8 split rings are used in
A. A.C. generator
B. A.C. motor
C. Transformer
D. D.C. motor
9 Electromagnetic induction is exactly according to law of:
A. Momentum
B. Charge
C. Energy
D. Mass
10 When back emf in motor is zero, it draws.
A. Zero current
B. Minimum current
C. Maximum current
D. Steady current

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