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

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Physics ICS Part 2 Chapter 15 Online MCQ's Test

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Question # 1

Electromagnetic induction obeys law of conservation

Question # 2

A real transformer does not change.

Question # 3

Mutual induction play role in.

Question # 4

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

Question # 5

The working principle of transformer is.

Question # 6

The application of mutual induction is a.

Question # 7

Energy density of an inductor is:

Question # 8

The movement of conductor in magnetic field produces electrical current was discovered in:

Question # 9

Commutator was invented by:

Question # 10

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 # 11

A.C is converted into D.C by

Question # 12

B2/2p is the expression of.

Question # 13

Energy density in an inductor is.

Question # 14

Commentator was invented by

Question # 15

Electromagnetic induction is exactly according to law of:

Question # 16

Energy stored in inductor is.

Question # 17

For step down transformer

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The Si unit of Mutual inductance is:
A. VA-1S-1
B. VAS-1
C. VSA-1
D. ASV-1
2 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
3 Unit of self inductance is
A. Weber
B. Tesla
C. Henry
D. Farad
4 Energy stored in inductor is.
A. 1/2 L I2
B. 1/2 LI
C. 1/2 L2I
D. 1/2 L2I2
5 If 10 A current passes through 100 mH inductor, then energy stored is.
A. 100 J
B. 5 J
C. 20 J
D. Zero
6 When back emf in motor is zero, it draws.
A. Zero current
B. Minimum current
C. Maximum current
D. Steady current
7 When motor is just started, back emf is almost.
A. Maximum
B. Zero
C. Minimum
D. Infinite
8 A.C. Generator based upon the
A. Lenz's law
B. Maxwell's relation
C. Faradays law of electromagnet induction
D. Mutual induction
9 The mutual inductance between two coils depends upon their
A. Size
B. Core material
C. Size, core material and separation
D. Separation
10 In A.C. generator , when plane of coil is perpendicular to magnetic field, then output of generator is.
A. NwAB
B. 2pi f
C. Maximum
D. Zero

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