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Revision of electricity and electrnics

LED Light Emitting Diode
LDR Light Dependent Resistor
Diode A device that only allows current to flow one way
DC Direct Current - Electricity that flows in one direction
AC Electricity that flows over and back 50 times a second
230 Volts The average voltage from a mains supply
Ohm The unit of resistance
Volt The unit of voltage
Amps The unit of current
Ohm's Law V = I x R
Watt The unit of Power
Kilowatt Hour The unit used in electricity bills
1 kilowatt 1000 watts
0.1kW 100watts
Forward bias diodes... will allow electricity to flow
Reverse bias diodes will stop the flow of electricity
The live wire is brown
The neutral wire is blue
The earth wire is Green and yellow
Created by: ainehallahan