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Question

An induced e.m.f. is produced when a magnet is plunged into a coil. The strength of the induced e.m.f. is independent of

A
the strength of the magnet
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B
number of turns of coil
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C
the resistivity of the wire of the coil
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D
speed with which the magnet is moved
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Solution

The correct option is D the resistivity of the wire of the coil
ϵ=NdϕdtϵN and ϵdϕdt

If so the speed of magnet is fast then correspondingly rate of change of flux is fast & ϵ increases. It does not depend on the resistance of coil.

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