Question

A coil of insulated copper wire is connected to a galvanometer. What would happen if a bar magnet is:

(i) Pushed into the coil

(ii) Withdrawn from inside the coil

(iii) Held stationary inside the coil

Answer 1

(i) Due to change in magnetic flux linked with a coil, the galvanometer shows deflection (say towards right).
(ii) Due to change in magnetic flux linked with a coil, the galvanometer shows deflection (say towards left opposite to that in case one).
(iii) As it is stationary, no change in magnetic flux is linked with the coil, so galvanometer shows no deflection.