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8Sci CH1
8th Science CH1 Electricity
Term | Definition |
---|---|
circuit | any complete pathway through which electrical current flows; requires a source of potential difference, a conducting path, and resistance |
conductor | material that allows electrical charges to flow freely from place to place |
current | rate at which electrical charges flow past a point in a circuit over a specific amount of time |
electrical charge | concentration of electricity; everything contains electrical charges which can be either positive (+) or negative (-) |
insulator | material that does not allow electrical charges to flow freely from place to place; insulators help transmit electricity safe from one location to another |
like charges | similar electrical charges that repel each other |
potential difference | change in total energy divided by the total electric charge; measured in volts (V ) or voltage; when potential difference stays the same, current decreases as resistance increases |
resistance | property of materials indicating how much energy is changed to thermal energy and light as an electrical charge passes through them |
unlike charges | dissimilar electrical charges that attract one another |