Electromagnetism

8. A metal ring in an electric motor that reverses the current.
10. A compass points to the southern magneticpole which is also known as this.
12. Elements that are strongly attracted to magnets.

1. A device which changes electrical energy into mechanical energy.
2. A magnetic field forms around a wire when this flows through the wire.
3. A device which changes mechanical energy into electrical energy.
4. The space around a magnet where the magnetic force is exerted.
5. This pole will attract the south pole of a magnet.
6. A system of train transportation that uses two sets of magnets
7. When an electric current is passed through a coil of wire wrapped around a metal core, a very strong magnetic field is produced.
9. Region within a magnetic material in which the magnetization is in a uniform direction
11. What the Earth's core is made of.