A coil of insulated copper wire is conncted to a galvnometer . What will happen if a bar magnet is (i) pushed into the coil , (ii) withdraw from inside the coil , (iii) held stationary inside the coil ?

Explanation

(i) The galvanometer will show a momentary deflection in one direction . It means a current is induced in the coil in one direction due to the relative motion between the coil and the magnet.
(ii) The galvanometer will show a momentray deflection in the opposite direction due to the relative motion between the coil and the magnet.
(iii)There will be no deflection in the galvanometer . It means no current is induced in the coil , as there is no relative motion between the coil and the magnet.