A coil of insulate copper wire is connected to a galvanometer. What will happen if a bar magnet is (i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary inside the coil ?

Explanation

(i) When the north pole (N) of the magnet is pushed into the coil, the galvanometer is deflected towards the right.
(ii) When the north pole (N) of the magnet is withdrawn from the coil, the galvanometer is deflected towards the left.
(iii) When the magnet is held stationary inside the coil, the deflection of the galvanometer is zero.