What is the difference between a bar magnet and U-shaped electromagnet.

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Solution

Bar Magnet
U-shaped Electromagnet
1. Its shape is like a bar. 1. Its shape is of U like structure.
2. It is a permanent magnet. 2. It is a temporary magnet
3. The magnetic field strength is constant. 3. The magnetic field strength produced by electromagnet is varied due to the number of turns of winding.

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Bar Magnet	U-shaped Electromagnet
1. Its shape is like a bar.	1. Its shape is of U like structure.
2. It is a permanent magnet.	2. It is a temporary magnet
3. The magnetic field strength is constant.	3. The magnetic field strength produced by electromagnet is varied due to the number of turns of winding.