How do electromagnets differ from permanent magnets, and what are they used for?
- 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.