There are two coils A and B.
Question:

 There are two coils A and B. 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 counterclockwise. B is kept stationary when A moves. We can infer that

(a) there is a constant current in the clockwise direction in A.

(b) there is a varying current in A.

(c) there is no current in A.

(d) there is a constant current in the counterclockwise direction in A.

Solution:

(d) there is a constant current in the counterclockwise direction in A.

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