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Online Tests
Physics Fsc Part 2 Chapter 4 Online Test MCQs With Answers
Question # 1
Eddy current is produced when:
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A metal is light in varying magnetic field
A metal is kept in steady magnetic field
A circular coil is placed in a steady magnetic field
A current is passed through a circualr coil
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Question # 2
Self induction does not depend on
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Number of turns of the coil
Area of cross section of the core
Nature of material of the core
Current through inductor
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Question # 3
Output of D.C. motor is
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A.C. energy
Mechanical energy
Chemical energy
D.C. energy
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Question # 4
Self inductance of a long solenoid is given by
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None of the above
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Question # 5
Electromagnetic induction obeys law of conservation
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Charge
Energy
Momentum
Mass
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Question # 6
The Lenz's law fulfils.
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Law of conservation of energy
Law of conservation of charge
Law of conservation of momentum
Kirchhoff's law
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Question # 7
Michael Faraday and Joseph Henry belongs to
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England and USA
France and USA
China and USA
None of these
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Question # 8
A real transformer does not change.
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Voltage level
Current level
Power level
Frequency
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Question # 9
The motional emf depends upon the
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Length of conductor
Speed of conductor
Strength of magnet
All of these
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Question # 10
Mutual induction play role in.
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Generator
D.C. motor
Galvanometer
Transformer
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Question # 11
When motor is just started, back emf is almost.
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Maximum
Zero
Minimum
Infinite
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Question # 12
The unit of induced emf is
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Ampere
Volt
Joule/coulomb
Both (b) and (c)
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Question # 13
For inducing emf in a coil the basic requirement is that:
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Flux should link the coil
Change in flux should link the coil
Coil should form a closed loop
Both (b) and (c) are true
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Question # 14
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:
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0.2 henry
0.1 henry
0.8 henry
0.04 henry
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Question # 15
The winding of the electromagnet in motor are usually called.
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Magnetic coils
Field coils
Electric coils
electric o electric coils
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Question # 16
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Question # 17
The device in the circuit that consume electrical energy are known as.
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Dissipaters
Generator
Load
Motors
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Question # 18
Energy stored in an inductor is:
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1/2L
2
I
1/2L
2
/I
1/2LI
2
1/2LI
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