Question

An electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet. What’s one advantage of using electromagnets in devices?
Electromagnets have a strong, constant magnetic field.

Electromagnets are more powerful than permanent magnets.

Electromagnets don’t need a source of electricity to work.

Electromagnets can easily be turned on and off.

Answer 1

D. One advantage of using electromagnets in devices would be that electromagnets can easily be turned on and off.