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Q.

A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be

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a

First anti clockwise then clockwise

b

First clockwise then anti clockwise

c

In clockwise direction

d

In anti clockwise direction

answer is C.

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Detailed Solution

By lenz's laws, current will be induced in the direction such that it will oppose the change in the  magnetic field. So, magnetic field is increasing in the direction towards the ring when north  pole of magnet is brought near the ring. So, induced current should produce magnetic field in the opposite direction of magnetic field by magnet. So, by Fleming's right hand rule current will flow in anti-clockwise direction

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A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be