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How do electromagnets differ from permanent magnets, and what are they used for?Key facts
- An electromagnet is created by running an electrical current through a coil of wire.
- An electromagnet can be made stronger by increasing the current, adding coils, or placing a steel or iron core inside the coil.
- Electromagnets are used whenever a magnetic field that can be switched on or off is needed.
- Electromagnets are used in car locks, electric doors, storing computer data, and lifting scrap metal.
Transcript
Without electromagnets we couldn't start our cars, open electric doors, or use computers.
Electromagnets are used whenever we require a magnetic field, which can be switched on or off.
We create an electromagnet by running an electrical current through a coil of wire.
From the wiring in the walls to the ...
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