| A | B |
|---|
| magnetism | the properties and interaction of magnets |
| magnetic field | surrounds a magnet and exerts a force on other magnets and objects made of magnetic materials |
| magnetic pole | region on a magnet where the magnetic force exerted by a magnet is strongest; like poles repel and opposite poles attract |
| magnetic domain | group of atoms in a magnetic material with th emagnetic 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 | da wire wrapped into a cylindrical coil |
| galvanometer | a device that uses an electromagnet to measure electric current |
| electric motor | device that converts electrical energy to mechanical energy by using the magentic forces between an electromagnet and a permanent magnet to make a shaft rotate |
| electromagnetic induction | process in which electric crurent is produced ina wire loop by a changing magnetic field |
| generator | device that used electromagnet induction to convert mechanical energy to electrical energy |
| turbine | large wheel that rotates when pushed by steam, wind, or water, and provides mechanical energy to a generator |
| direct current (DC) | electric current that flows in only one direction |
| alternating current (AC) | elecrtic 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 |
