Three identical closed coils A, B and C are placed parallely. Coils A and C carry equal currents as shown in Fig. Coils B and C are fixed and coil A is moved towards B with uniform speed. Will there be any induced current in B? If no, give reason. If yes, mark the direction of the induced current in fig.

Explanation

As coil A moves towards coil B, the number of magnetic lines of force linked with coil B will increases and hence a current will be induced in coil B. Since there is no relative motion between coils B and C, the current in coil C cannot induce any current in coil B. So, according to Lenz's law, the direction of current in coil B will be opposite to that in A,