Question

State two advantage of an electromagnet over a permanent magnet

Answer 1

1) An electromagnet can produce a strong magnetic field .

2) The polarity of an electromagnet can be changed by reversing the direction of current in its solenoid.

Explanation:

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Answer 2

Answer:

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