Question

a permanent magnet becomes weak with time why give reason

Answer 1

There is no existence of permanent magnets in the world. Magnets lose their power when in contact with other magnet, iron filling and so on. But the main reason it loses its power is because of earthing, the magnetic power becomes less when kept on earth directly.

Answer 2

Here is ur answer...........

After the long time use of permenent magnet it loses its magnetic power and can not produce as much strong magnetic field as before. So a permenent magnet becomes weak with time.

Hope it helps!!☺☺