Question

A permanent magnets becomes weak with time. What can be done to prevent this?

Answer 1

If u want to make it stronger , take another magnet and rub it on the magnet which is weaker , this makes the magnet stronger and the magnet which u used to rub on it will not become weak!

or

U can wound a copper coil on the magnet and pass electric current trough it! It will strengthen the magnetic field making it a ferromagnetic substance!

Hope it helps!!

Answer 2

how do magnet made by stone