State three differences between temporary and permanent magnets.

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Solution

Temporary magnet
Permanent magnet
1. It shows magnetic properties as long as the current is passed through the coil wound on it. The magnetic property exists at all times in a permanent magnet.
2. Its strength and polarity can be changed. Its strength and polarities are fixed and cannot be changed.
3. It is made of soft iron. It is made of steel.

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	Temporary magnet	Permanent magnet
1.	It shows magnetic properties as long as the current is passed through the coil wound on it.	The magnetic property exists at all times in a permanent magnet.
2.	Its strength and polarity can be changed.	Its strength and polarities are fixed and cannot be changed.
3.	It is made of soft iron.	It is made of steel.