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Electromagnetic induction

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

Reduced inductance
Unchanged inductance
Zero inductance
Increased inductance

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Electromagnetic induction
Which of the following circuit elements will oppose the change in circuit current?

Resistance
Inductance
Capacitance
All of the listed here

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Electromagnetic induction
As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it

Cuts magnetic flux
Lies in a magnetic field
Moves parallel to the direction of the magnetic field
Lies perpendicular to the magnetic flux

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Electromagnetic induction
Two 300 uH coils in series without mutual coupling have a total inductance of

600 uH
900 uH
1200 uH
300 uH

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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
Flux density of the magnetic field
Amount of flux linkages
Amount of flux cut

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Electromagnetic induction
An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is

0.2 wb
2 wb
0.02 wb
20 wb

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MORE MCQ ON Electromagnetic induction

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