Question

A magnet can be demagnetised by

• A. heating it repeatedly
• B. dropping it frequently from a height
• C. hammering it frequently
• D. all the above processes

Answer 1

The correct option is D

all the above processes

Explaination for correct answer:option(D)

DEMAGNETISING A MAGNET:

When a magnet losses its magnrtic power by some external causes, it is known as demagnetising of a magnet.

The magnetic property of the given magnet can be destroyed by:

1. Hammering it violently again and again.
2. Heating it to a very high temperature.
3. Dropping it on the floor, from a sufficient height, a large number of times.
4. Passing a strong alternating current through it.

Hence,A magnet can be demagnetised by all given processes.