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