Fun with Magnets - 1

Suspension does not cause demagnetisation of magnets as poles in case of suspension are properly aligned in the north–south direction.

Magnetite is known as the world’s first natural magnet.

Magnet was discovered in Greece.

The person who discovered magnet was a shepherd.

The opposite poles of two magnets attract each other as unlike charges or unlike poles attract each other.

Cloth, leather and scale are non-magnetic in nature.

The materials which get attracted towards a magnet are called magnetic materials.

Magnets should be stored safely because they become weak and lose their magnetism if handled carelessly.

A freely suspended bar magnet points towards North.

To prevent self-demagnetisation of a horseshoe magnet, a piece of iron is kept across its poles.

When a bar magnet immersed in a heap of iron filings is taken out, it is observed that iron filings stick to the surface of the bar magnet. The iron filings would be observed to have the maximum concentration at the two ends of the bar magnet.

By using a magnet, we can separate screws and iron nails wood powder without wasting time. This is because screws and iron nails are easily attracted by magnets.

A cork is made up of rubber which is a good insulator and has no role in magnetism. So, cork is not required while making a magnet.

It is advised not to heat a magnet because heating leads to loss of magnetism or demagnetisation of the magnet.

The directional property of a magnet is remarkable. A magnetic compass, which is used to find direction, utilises the directional property of magnets.