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current
rate of flow of charge
current is measured in
Amps
voltage
energy transferred per unit charge
resistance
slows down flow of circuit
more resistance means
less current
charge measured in
coulombs
live wire is
brown
neutral is
blue
earth wire is
green/yellow
fuse
overheats is current is too high to protect circuit
cuts off live suppy
high temperature means
more resistance
thermistor
temperature dependent resistor
more heat in thermistor =
less resistance
LDR
changes resistance depending on light
LDR use
burglar dectors
bright= less resistancr
LED
indicate prescence of current in a circuit
series circuit
current is the same
voltage is shared
parallel circuit
current shared
voltage is the same