7
Question
Permanent magnetism are demagnetized by:
Permanent magnetism are demagnetized by:
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Solution
The correct options are
A Heating
B Hammering
C Dropping from a height
A magnet can lose its properties if it is heated beyond a certain temperature, hammered or if it is dropped from a height. Mild heating causes a reduction in magnetic strength. The loss in magnetism is caused because the domains gain kinetic energy and start pointing in different directions. However, if a magnet is stored properly it will retain its magnetism longer.
A Heating
B Hammering
C Dropping from a height
A magnet can lose its properties if it is heated beyond a certain temperature, hammered or if it is dropped from a height. Mild heating causes a reduction in magnetic strength. The loss in magnetism is caused because the domains gain kinetic energy and start pointing in different directions. However, if a magnet is stored properly it will retain its magnetism longer.
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