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Rotational EMF

In an experim...

Question

In an experiment, a magnet with its magnetic moment along the axis of a circular coil and directed towards the coil, is withdrawn away from the coil and parallel to itself. The current in the coil, as seen by the withdrawing magnet, is

A

zero

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B

clockwise

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C

anticlockwise

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D

first (a) then (b)

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Solution

The correct option is B clockwise
As magnet is withdrawn from the coil, field into the coil decreases. To increase this field, current induced in the coil must be clockwise as seen by the withdrawing magnet.

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