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Alenkinab [10]
2 years ago
11

I

Physics
1 answer:
Alika [10]2 years ago
6 0

Answer:

1.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.

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