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Magnetic Flux and Faraday's Law

A magnet is m...

Question

A magnet is moving towards the coil along the axis and the emf induced in the coil is ‘e’. If the coil also starts moving towards the magnet with the same speed, the induced emf will be

A

\frac{e}{2}

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B

e

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C

2e

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D

4e

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Solution

The correct option is C 2e
As relative velocity is doubled. $\frac{d ϕ}{d t}$ is also doubled hence emf induced becomes doubled.

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