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Electricity
Revision of electricity and electrnics
Term | Definition |
---|---|
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 |