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GCSE C21 P5 keyword

GCSE C21 P5 keyword - flashcard and matching

QuestionAnswer
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
Created by: allydavies on 2012-12-16



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