| A | B |
|---|
| magnetism | the properties and interactions of magnets |
| magnetic field | area surrounding a magnet where force is exerted on other magnets and objects made of magnetic materials |
| magnetic pole | region on a magnet where the magnetic force is strongest; like poles repel and opposite poles attract |
| magnetic domains | groups of atoms in a magnetic material with magnetic poles of the atoms pointing in the same direction. |
| electromagnet | temporary magnet made by wrapping a wire coil, carrying a current, around an iron core |
| solenoid | a wire wrapped around a cylindrical coil |
| galvanometer | a device that uses an electromagnet |
| electric motor | device that converts electrical energy to mechanical energy by using the magnetic forces between an electromagnet and a permanent magnet to make a shaft rotate. |
| electromagnetic induction | process in which electric current is produced |
| generator | device that uses electromagnetic induction to convert mechanical energy into electrical energy |
| turbine | large wheel that rotates when pushed by steam, wind or water and provides mechanical energy to a generator |
| direct current | electric current that flows in only one direction |
| alternating current | electric current that reverses its direction of flow in a regular pattern |
| transformer | device that uses electromagnetic induction to increase or decrease the voltage of an alternating current |
