Question

Demonstrate an activity to show that repulsion is surest test of magnetization.

Answer 1

Take the needle of a compass. Bring a non-magnetic bar near the pole of the magnetic needle. The pole will attract the bar, and the same thing will happen even if we turn the bar around with its other end facing the compass. But, if the bar is magnetic, one pole of the needle will get attracted to it, and the other pole of the needle will get repelled by the pole of the magnet facing the compass.
When one pole of the needle gets repelled by one of the poles of the magnet, the former will swing around. Hence, the north pole of the needle will face the south pole of the magnet and vice versa. Thus, we can say that only repulsion is the surest test of magnetization.