| VOCAB | DEFINITIONS |
| ELECTRODYNAMICS | the science of electric charges in motion |
| The Nature of an Electric Current | an electric current consists of a flow of charged particles, which may occur under th following conditions, 1. in a vacuum, 2. in a glass, 3. in an ionic solution 4. in a metallic conductor |
| ELECTRIC CURRENT | in a solid conductor, consists of a flow of electrons only |
| ELECTRIC CIRCUIT | defined as the path over which the current flows |
| BATTERY | converts chemical energy to electrical energy |
| GENERATOR | converts mechanical energy to electrical energy |
| POTENTIAL DIFFERENCE | difference in electrical potential energy between two points in an electric circuit |
| VOLT | (the unit of potential difference) which will maintain a current of ampere in a circuit whose resistance is one ohm |
| ELECTROMOTIVE FORCE (emf) | applies to the maximum difference of potential between the terminals of a battery |
| CURRENT | defined as the amount of electric charge flowing per second |
| AMPERE | the unit of current |
| RESISTANCE | is that property of the circuit which opposes or hinders the flow of an electric current |
| OHM | the unit of electrical resistance |
| The resistance of a conductor depends on | Material, (conductors, semi-conductors, insulators) Length, Cross-Sectional Area, and Temperature |
| Dry Cell Battery | used in flashlights |
| Wet Cell Battery | used as an automobile battery |
