Question

A coil of insulated copper wire is conected to a galvanometer. What will happen if a bar magnet is-

a) pushed into the coil with its north pole entering first...?

b) withdrawn from inside the coil...?

c) held stationary....??

Answer 1

In the first case ,looking from the side of magnet,current will be induced in the coil in the anticlockwise direction .
In the second case,looking from the side of magnet,current will be induced in the coil in the clockwise direction.
In the third case nothing will happen.
The galvanometer will show the appropriate deflection in case 1 and 2,and no deflection in case 3.

Answer 2

Explanation:

(i) The needle of the galvanometer shows a momentary deflection in a particular direction.

(ii) The needle of the galvanometer shows a momentarily in the opposite direction.

(iii) The needle of the galvanometer shows no deflection.