Electricity and Circuits (EdExcel)
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1
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what are conductors?
they are components that allow the charge to pass through them
2
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what is current?
flow of charges
3
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what is EMF?
the potential difference across battery
4
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what is potential difference?
it is the work done in driving a charge
5
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what is resistance?
it is the opposition to current
6
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state ohm’s law
resistance is directly proportional to current when physical conditions e.g temperature are constant.
7
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what is electrical power?
it is the rate of energy transfer
8
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what is a diode?
a component that allows current to pass in one direction only.
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