| A | B |
|---|
| electrical charge | concentration of electricity |
| unlike charges | atract one another |
| like charges | repel one another |
| insulator | a material in which electrical charges that doesn't move freely |
| conductor | a material in which electrical charges do move freely |
| circuit | a complete or closed path |
| current | the amount of electrical charge that flows past a point in a circuit |
| potential difference | the change in potential energy divided by the total charge |
| resistance | a property of material that indicates how much energy changes to thermal energy and light as and electrical charge flows through the material |
| magnetic poles | the two ends of the magnet that point north-south |
| magnetic field | the region around a magnet where the magnetic force acts |
| induced magnetism | magnetism that occurs only in the presents of the magnetic field |
| electromagnet | a magnet made out of nothing more than a current-carrying wire |
| loudspeaker | changes viriations in electric current into sound waves |
| electric motor | uses an electromagnet to change electric energy into mechanical energy |
| induced current | an electric current produced by using a magnet |
| electric generator | energy of rotation into electric energy |
| transformers | raise or lower the voltage |
