Question

Name the magnets that keep their magnetism for a long time.​

Answer 1

Answer:

Magnetism: The property due to which a substance attracts iron pieces towards it, is called magnetism.

The substance having property of magnetism, is called magnet.

There are two types of magnets: temporaryand permanent.

Magnets that retain their magnetic properties only for a short period of time are called temporary magnets.

Magnets that retain their magnetic properties for a long period of time are called permanent magnets.

Temporary magnets are usually made of iron, cobalt, or nickel. These materials behave like magnets only when they are near a strong magnet. They quickly lose their magnetic property if the influence of the strong magnet is removed.

Permanent magnets are made from mixtures of iron, cobalt, or nickel with other materials. These make strong magnets and retain their magnetic properties for a long time.

Answer 2

Magnets that retain their magnetic properties for a long period of time are called permanent magnets. 

I hope it will help you