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Electromagnetic induction

Electromagnetic induction
The self inductances of two coils are 8 mH and 18 mH. If the coefficient of coupling is 0.5, the mutual inductance of the coils is

18 mH
6 mH
36 mH
12 mH

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

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

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

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Electromagnetic induction
The magnitude of the induced e.m.f. in a conductor depends on the

Rate of change of flux-linkages
Amount of flux linkages
Amount of flux cut
Flux density of the magnetic field

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Electromagnetic induction
Which of the following is unit of inductance?

Ampere turns
Hennry
Ohm
Weber/metre

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Electromagnetic induction
Which of the following circuit element stores energy in the electromagnetic field?

Resistance
Condenser
Inductance
Variable resistor

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MORE MCQ ON Electromagnetic induction

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