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Chapter 7
Vocabulary
| Term | Definition |
|---|---|
| static electricty | the accumulation of excess electric charge on an object. |
| law of conservation of charge | states that charge can be transferred from on object to another but cannot be created or destroyed. |
| conductor | material, such as copper wire, in which electrons can move easily. |
| insulator | material in which electrons are not able to move easily. |
| charging by contact | process of transferring charge between objects by touching or rubbing. |
| charging by induction | process of rearranging electrons on a neutral object by bringing a charged object close to it. |
| electric current | the net movement of electric charges in a single direction, measured in amperes. |
| voltage difference | related to the force that causes electric charges to flow; measured in volts. (V) |
| circuit | closed conduction loop through which an electric current can flow. |
| resistance | tendency for a material to oppose electron flow and change electrical energy into thermal energy and light; measured in ohms. |
| Ohm's law | states that the current in a circuit equals the voltage difference divided by the resistance. |
| series circuit | circuit in which electric current has only one path to follow. |
| parallel circuit | circuit in which electric current has more than one path to follow. |
| electrical power | rate at which electrical energy is converted to another form of energy; expressed in watts. (W) |