Question

A bar magnet loses its strength when it is

• A. hammered
• B. heated
• C. both (A) and (B)
• D. none of these

Answer 1

The correct option is C

both (A) and (B)

1. The magnetic property of a magnet can be lost if it is heated or hammered frequently.
2. By heating or hammering the magnet continuously its magnetism will decrease.
3. Demagnetization of magnet happens when heated, dropped from a height, or hammered.

So, the correct option is (C).