State two differences between an electromagnet and a permanent magnet.

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Solution

Electromagnet Permanent magnet

It is made up of soft iron It is made up of steel

The magnetic field strength can be changed The magnetic field strength cannot be changed

Electromagnets of very strong field can be made. Permanent magnets are not so strong.

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Write two properties of a material suitable for making (a) a permanent magnet, and (b) an electromagnet

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Electromagnet	Permanent magnet
It is made up of soft iron	It is made up of steel
The magnetic field strength can be changed	The magnetic field strength cannot be changed
Electromagnets of very strong field can be made.	Permanent magnets are not so strong.