Question

A coil of insulated copper wire is connected to a galvanometer. What will happen

if a bar magnet is :

(i) pushed into the coil ?

(ii) held stationary inside the coil ?

(iii) withdrawn from inside the coil ?​

Answer 1

(i)

• As a bar magnet is pushed into the coil, a momentary deflection is observed in the galvanometer indicating the production of a momentary current in the coil.

(ii)

• When the bar magnet is held stationary inside the coil, there is no deflection in galvanometer indicating that no current is produced in the coil.

(iii)

• When the bar magnet is withdrawn (or pulled out) from the coil, the deflection of galvanometer is in opposite direction showing the production of an opposite current.