A coil of insulated 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(ii) withdrawn from inside the coil,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?

(I) When a bar magnet is pushed into the coil then a current is induced momentarily in the coil due to electromagnetic induction . As a result galvanometer shows momentarily deflection.
(II) When a bar magnet is withdrawn from inside the coil, a current is again induced momentarily in the coil but in opposite direction. As a result galvanometer shows momentarily deflection but in opposite direction.
(iii) When a bar magnet is held stationary inside the coil, there will be no current induced in the coil. So there will be no deflection in the galvanometer.