Why is it necessary to use at least one electromagnet in a motor instead of using only permanent magnets?
Because as you might already know electromagnets use a conductive metal and electricity to make the said electromagnet. So what do you get if you use the electromagnet and move it through coiled wire. The magnetism makes a electrical current thus making your motor.
I hope that this was helpful for you. :3
A correct answer (sample response) is:
Generators are important because they can provide electricity during a power outage. This is especially important at hospitals, so doctors and nurses can continue to treat patients during a power outage.
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