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What is an electromagnet?
A magnet created by an electric current.
What 3 things are needed to make an electromagnet?
Battery, wire, and an iron core.
What happens if the current is switched off?
The electromagnet loses its magnetism.
How can an electromagnet be made stronger?
More coils, more current, and using an iron core.
Why are electromagnets useful?
They can be turned on and off.
Name one use of an electromagnet.
Scrap metal crane (or speaker, motor, bell).