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Electromagnetic induction

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

Iron core
Air core
Laminated iron core
Powdered iron core

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

300 uH
600 uH
900 uH
1200 uH

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Electromagnetic induction
Which of the following is unit of inductance?

Ohm
Ampere turns
Weber/metre
Hennry

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Electromagnetic induction
Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is

10 H
5 H
15 H
20 H

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

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

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Electromagnetic induction
The law that the induced e.m.f. and current always oppose the cause producing them is due to

Newton
Coulomb
Lenz
Faraday

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MORE MCQ ON Electromagnetic induction

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