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Difference between Electromagnets and Permanent Magnets

State two adv...

Question

State two advantages of an electromagnet over a permanent magnet.

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Solution

Two advantages of an electromagnet over a permanent magnet are:

1. The strength of the magnetic field of an electromagnet can easily be changed by changing the current in its coil.

2. The polarity of the magnetic field of an electromagnet can be changed by reversing the direction of the current.

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Difference between Electromagnets and Permanent Magnets

Standard VII Physics

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