How is an electromagnet better than a permanent magnet ?

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Solution

Permanent magnet Electromagnet
1. Magnetism is permanent. 1. Magnetism is temporary.
2. Weak magnetic field. 2. Strong magnetic field.
3. Poles cannot be interchanged. 3. Poles can be interchanged.

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In certain applications, electromagnets are better than permanent magnets because:
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How is a permanent magnet is different from an electromagnet?

Listed below is the use of magnets and electromagnets. Indicate whether a permanent magnet or an electromagnet is used with an explanation.

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Permanent magnet	Electromagnet
1. Magnetism is permanent.	1. Magnetism is temporary.
2. Weak magnetic field.	2. Strong magnetic field.
3. Poles cannot be interchanged.	3. Poles can be interchanged.