| A | B |
|---|
| Electromagnetism | the relationship between electricity and magnetism |
| solenoid | a coil of wire with a current |
| electromagnet | a solenoid with a ferromagnetic material inside |
| energy | the ability to move an object |
| electrical energy | the energy of electric currnets |
| mechanical energy | the energy of motion |
| galvanometer | a device that measures small currnets |
| electric motor | uses an electirc current to turn an axle |
| electromagnetic induction | when an electric current is created in a conductor by moving the conductor through a magnetic field |
| direct current | a current that flows in only one direction |
| alternating current | a current thatreserves direction repeatedly |
| electric generator | changes mechanical energy into electrical energy |
| transformer | ismade up of two coils of wire, each wrapped around an iron core |
| step-up transformer | increases voltage |
| step-down transformer | decreases voltage |
