Question

what is the answer for this question?​

Answer 1

aghav03joshi Helping Hand

(a)As the key is closed, the galvanometer needle will deflect for a moment and then return to zero.

(b)As the key is removed ,again a momentary deflection (but more) because of the change in magnetic flux linked with the coil is observed in the galvanometer in opposite direction .

(c)With the key closed ,if the coil A and B are moved with the same speed in the same direction ,there is no deflection in the galvanometer because there is no change in the magnetic flux linked with the coil a.

The phenomenon involved is Electromagnetic