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Question


Which of the following gets demagnetised when a powerful magnet is kept near it?


Options:
A .   Plastic ruler
B .   Glass tumbler
C .   Compact disc
D .   Wood
Answer: Option C
:
C

The magnetic property of a compact disc may be damaged when a powerful magnet is kept near it. Plastic, glass and wood are non-magnetic substances, hence they cannot be magnetised or demagnetised.



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