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Faraday's Law

In the follow...

Question

In the following figure, the magnet is moved towards the coil with a speed v and induced emf is e. If magnet and coil recede away from one another each moving with speed v, the induced emf in the coil will be

A

e

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B

2e

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C

e/2

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D

4e

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Solution

The correct option is B 2e
The magnitude of induced emf is proportional to the relative velocity between the coil and the magnet. As the velocity is doubled, the emf induced will also be doubled.

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