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Electromagnetic induction

Electromagnetic induction
Lenz's law is a consequence of the law of conservation of

Energy
Induced e.m.f.
Charge
Induced current

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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
A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is

None of the listed here
250 mH
3500 mH
350 mH

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

No
Yes

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Electromagnetic induction
A conductor carries 125 amperes of current under 60° to a magnetic field of 1.1 tesla. The force on the conductor will be nearly

60 N
120 N
90 N
30 N

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Electromagnetic induction
A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be

6 mH
12 mH
24 mH
48 mH

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