$A$ coil made of insulated copper wire is connected to a galvanometer. What will happen to the deflection of the galvanometer if this coil is moved towards a stationary bar magnet and then moved away from it? Give reason for your answer and name the phenomenon involved.

(N/A) When the coil is moved towards a stationary magnet,the magnetic flux linked with the coil changes,which induces an electric current in the coil. This causes the galvanometer to show a deflection in one direction.
When the coil is moved away from the magnet,the magnetic flux linked with the coil changes in the opposite sense,inducing a current in the opposite direction. This causes the galvanometer to show a deflection in the opposite direction.
The phenomenon involved is known as electromagnetic induction.