| A | B |
|---|
| law of electric charges | like charges repel or push away, and opposite charges attract |
| electric force | the force of attraction or repulsion on a charged particle |
| electric field | a region around a charged object in which an electric force is exerted on another charged object |
| electrical conductor | a material in which charges can move freely |
| electrical insulator | a material in which charges cannot move freely |
| electric discharge | the release of electricity stored in a source |
| static electricity | stationary electric charges that are on the surface of an object |
| friction | electrons are "wiped" from 1 object onto another |
| conduction | when electrons move from 1 object to another by direct contact |
| induction | when charges in an uncharged metal object are rearranged without direct contact with a charged object |
| photocell | device that converts light energy into electrical energy |
| thermocouple | a device that converts thermal energy into electrical energy |
| resistance | opposition to the flow of electrical charges; expressed in ohm, |
| voltage | the potential difference between two points in a circuit; measure in Volts, V |
| electric current | the rate at which charges pass through a given point; expressed in amperes |
| cell | can change chemical or radiant energy into electrical energy |
| electrical energy | is the energy of electrical charges |
| direct current | charges always flow in the same direction |
| alternating current | charges continually shift from flowing in one direction to flowing in the reverse direction |
| Ohm's Law | I = V / R |
