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Electromagnets

Which of the ...

Question

Which of the following statements is false regarding an electromagnet?

A

It is used in fan and radio

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B

It is a permanent magnet

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C

It works only in the presence of electricity

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D

It can easily be magnetized and demagnetized

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Solution

The correct option is B It is a permanent magnet
Electromagnets are used in fans and radios.
It acts as a magnet only when the current is passing through it, hence it is not a permanent magnet. It can be magnetised and demagnetized by switching on and switching off the current.

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