Question

Why electromagnet are more usefull than a permanent magnet answer in short and easy

Answer 1

An electromagnet is more useful than a permanent magnet as it can be turned on and off anytime we want.

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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.