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

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

Question # 2

The induction can be increased by winding the wire around a core made of.

Question # 3

The self induction emf is some times called.

Question # 4

Commutator was invented in

Question # 5

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

Question # 6

Which of the following quantities remain constant in step up transformer?

Question # 7

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

Question # 8

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 # 9

If speed of rotation of a generator is doubled the output voltage will be.

Question # 10

The working principle of transformer is.

Question # 11

split rings are used in

Question # 12

The mutual inductance between two coils depends upon their

Question # 13

When motor is just started, back emf is almost.

Question # 14

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

Question # 15

In case of inductor , energy is stored in the

Question # 16

Lenz's law deals with

Question # 17

the core of transformer is laminated so reduce.

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 In case of inductor , energy is stored in the
A. Electric field
B. Magnetic field
C. Potential field
D. Gravitational field
2 Electromagnetic induction obeys law of conservation
A. Charge
B. Energy
C. Momentum
D. Mass
3 Commutator was invented by:
A. William bills
B. William Gates
C. William tells
D. William Sturgeon
4 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:
A. 0.2 henry
B. 0.1 henry
C. 0.8 henry
D. 0.04 henry
5 EMF is induced due to change in
A. Charge
B. Current
C. Magnetic flux
D. Electric field
6 Energy density in an inductor is.
A. Directly proportional to magnetic field
B. Directly proportional to square of magnetic field
C. Inversely proportional to magnetic field
D. Inversely proportional to square of magnetic field
7 The direction of induced current is always so as to oppose the change which causes the current, this is the statement of
A. Lenz's law
B. Faraday's law
C. Ampere's law
D. Coulomb's law
8 A simple device that prevents the direction of current from changing is called.
A. Commutator
B. Rotor
C. Armature
D. Detector
9 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' s1ast rule
10 The emf induced by the motion of a conductor across a magnetic field is called:
A. Motional emf
B. Rotational emf
C. Induced emf
D. All of above

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