Question

An unmagnetised bar of steel can be_______ by rubbing a bar magnet along its length.

Answer 1

1. A unmagnetised magnetic substance can be converted into a magnetic substance by various methods.
2. Single touch, double touch, divided touch, and electric field.

Single touch:

1. A permanent bar magnet is taken and one pole is placed on one end of the steel bar and then drawn to the other end, keeping it in the inclined position.
2. The permanent magnet is then lifted and the process is repeated several times.
3. The steel bar is then turned over and the other side is also magnetised in the same way.
4. The steel bar gets magnetised.

Hence, an unmagnetised bar of steel can be magnetised by rubbing a bar magnet along its length.