A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when
-
A.
the magnet is moved away from the stationary solenoid -
B.
the solenoid is moved away from the stationary magnet -
C.
the magnet is moved towards the stationary solenoid -
D.
there is no relative motion between the magnet and the solenoid