Question

A magnet can be demagnetised by

• A. Hammering the magnet
• B. Putting it in the water
• C. Cooling it
• D. Putting it in contact with iron

Answer 1

The correct option is A Hammering the magnet

A magnet has magnetic moments inside it, that is, the molecules are arranged in particular direction which are responsible for magnetism. But when we strike it the arrangement of molecules get disturbed due to which the magnetism gets weaken since the molecules are no longer arranged in the fashion required to cause magnetism.