Question

Which of the following is involved in magnetising an iron strip with the help of a bar magnet?

• A. Rubbing two iron pieces together.
• B. Only touching an iron piece with a magnet.
• C. Rubbing the whole of a bar magnet on the iron piece.
• D. Rubbing one end of a bar magnet repeatedly on the iron piece.

Answer 1

The correct option is D Rubbing one end of a bar magnet repeatedly on the iron piece.

Steps involved in magnetising an iron strip are:
(i) Take an iron strip which is to be magnetised.
(ii) Keep it on a wooden table.
(iii) Hold one end of the bar magnet with your hand and keep the other end of the bar magnet near the edge of the iron strip.
(iv) Without lifting, move it along the length of iron strip till you reach the other edge.
(v) After reaching the end of the iron strip, lift the bar magnet and bring it to the same position and repeat the process again and again.