Question 7
(a) What is a magnetic material?
(b) Describe two ways of demagnetizing a magnet.
Observation
In the question candidates performance was average.
The expected answers are
(a) Magnetic material
A substance that can be made a magnet
OR
A substance that can be attracted by a magnet
(b) Description of ways of demagnetizing a magnet
Any 2 x 1
- Place the magnet in a solenoid whose axis points in east-west direction and apply alternating current through it. Then withdraw the magnet very slowly out of it to a long distance.
- Hold the magnet pointing in east-west direction and hammer/hit it hard repeatedly