There are two coils A and B as shows in the figure. A current starts flowing in B as shown, when A is moved towards B and stops when A stops moving. The current in A is counter clockwise. B is kept stationary when A moves. We can infer that

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There is a constant current in the clockwise direction in A

There is no current in A

there is a constant current in the counter clockwise direction in A

There is a varying current in A

answer is D.

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Detailed Solution

Due to the current in loop B magnetic flux linked with the coil A is inward direction. So when coil A approaches B downward flux increases and according to Lenz's law induced current will produce a outward flux so current must be anticlockwise direction.

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