The diagram, shows a fixed coil of several turns connected to a centre zero galvanometer G and a magnet NS which can move in the direction shown in the diagram.

(a) Describe the observation in the galvanometer if (i) the magnet is moved rapidly, (ii) the magnet is kept stationary after it has moved into the coil, (iii) the magnet is then rapidly pulled out of the coil.

(b) How would the observation in (i) of part (a) change if a more powerful magnet is used?

(a) (i) A deflection is observed in the galvanometer towards the right when the magnet is moved away rapidly.

(ii) The deflection becomes zero, when the magnet is kept stationary after it has moved into the coil.

(iii) The deflection again occurs in opposite direction, when the magnet is rapidly pulled out of the coil.

(b) When a more powerful magnet is used then the deflection is increased.