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Electromagnetic induction

Electromagnetic induction
The direction of induced e.m.f. can be found by

Laplace's law
Fleming's right hand rule
Kirchhoff s voltage law
Lenz's law

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

Laminated iron core
Powdered iron core
Air core
Iron core

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

900 uH
300 uH
1200 uH
600 uH

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Electromagnetic induction
Increasing the field or increasing the current will decrease the force on the conductor.

Yes
No

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

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

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Electromagnetic induction
An e.m.f. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be

4 A/s
12 A/s
20 A/s
16 A/s

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