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Electromagnetic induction

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

Increased inductance
Reduced inductance
Zero inductance
Unchanged inductance

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Electromagnetic induction
Which of the fpllowing inductor will have the least eddy current losses ?

Laminated iron core
Powdered iron core
Air core
Iron core

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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

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

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

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

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Electromagnetic induction
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will

None of the listed here
Increases
Decreases
Remains same

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Electromagnetic induction
In case of an inductance, current is proportional to

None of the listed here
Voltage across the inductance
Both of the listed here
Magnetic field

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MORE MCQ ON Electromagnetic induction

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