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Electromagnetic induction

Electromagnetic induction
A crack in the magnetic path of an inductor will result in

Unchanged inductance
Increased inductance
Reduced inductance
Zero inductance

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Electromagnetic induction
A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by

Variation in voltage to the coil
Variation in coil current
The resistance of magnetic path
Change of number of turns of coil

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Electromagnetic induction
A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

15 V
12 V
25 V
10 V

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Electromagnetic induction
The coefficient of coupling between two air core coils depends on

Mutual inductance and self inductance of two coils
Mutual inductance between two coils only
None of the listed here
Self-inductance of two coils only

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Electromagnetic induction
A moving magnetic field will produce the same effect as a conductor that is moving.

False
True

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Electromagnetic induction
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as

Mutual inductance
Self-inductance
Series aiding inductance
Capacitance

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MORE MCQ ON Electromagnetic induction

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