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GCSE C21 P5 keyword
GCSE C21 P5 keyword - flashcard and matching
| Question | Answer |
|---|---|
| opposes the movement of electrical charge | resistance |
| unit for resistance | ohm |
| unit for potential difference | volt |
| unit for current | amp (ampere) |
| standard unit for electrical energy transferred | joule |
| unit for (large amounts of) electrical energy transferred | kilowatt-hour |
| unit for electrical power | watt |
| a flow of charge; how much charge passes a point each second, measured in amps | current |
| indicates the push on each charge AND the energy transferred by each charge | voltage |
| has negative charge, in metals there are lots that can move easily, carrying the current | electron |
| transferred when a charge moves through a pd | energy |
| has no free electrons, so doesn't conduct a current | insulator |
| has lots of free electrons, so lets current flow through it easily | conductor |
| how a changing magnetic field makes a voltage in a wire | induction |
| device that can increase or decrease an alternating voltage | transformer |
| a current or voltage that goes to and fro / back and forth | alternating |
| produced by a flow of current in a coil | magnetic field |
| current must pass through all components - one after another | series |
| each electron will pass through one branch or another | parallel |
| its resistance depends on the temperature | thermistor |
| its resistance depends on the light level | LDR |