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 towards the stationary solenoid
B. there is no relative motion
C. the magnet is moved away from the stationary solenoid
D. the solenoid is moved away from the stationary magnet

Correct Answer:

Option B – the magnet is moved away from the stationary solenoid

Explanation

If both the coil and the magnet are stationary, then there is no change in the magnetic flux and hence no current is induced in the coil.