First slide

Faraday's law of Electromagnetic induction

Question

A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then :

Easy

A

a current will be induced in the coil
B

no current will be induced in the coil
C

an emf and a current both will be induced in the coil
D

none of the above

Solution

Magnetic flux linked with the coil does not change if magnet is rotated about it's own axis, emf does not induced. So induced current is zero.

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