Whenever the magnetic flux linked with a coil changes, an induced e.m.f. is produced in the circuit. The e.m.f. lasts

for a short time

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for a long time

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for ever

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so long as the change in flux takes place

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Solution

The correct option is D so long as the change in flux takes place
It's a fact. Faraday's law says the induced emf in a coil is equal to the rate of change of magnetic flux through it. If the magnetic flux doesn't change then emf is zero.

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Whenever the magnetic flux () linked with a coil changes the emf is induced in the circuit, This emf lasts

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