Electromagnet
Key Stage 3
Meaning
An electromagnet is a magnet made from a coil of wire wrapped around a soft iron core.
About Electromagnets
- Electromagnets only work when there is a direct current passing through the coil of wire.
- An electromagnet can be turned off and on.
- The strength of an electromagnet depends on; the number of coils of wire, the current through the wire and how easily the soft iron core can be magnetised.
The direction of the magnetic field can be changed by changing the direction of the current. |