AQA GCSE Combined Science Trilogy · 8464
Specification 6.1.1.4 · Paper 5, Paper 6
Revise: PowerA kilowatt is 1000 watts, so an appliance operating at 2 kW transfers 2000 J each second.
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GCSE Combined Science · key term
The unit of power. A power of one watt means that one joule of energy is transferred each second: .
Used by AQA and Edexcel
Specification 6.1.1.4 · Paper 5, Paper 6
Revise: PowerA kilowatt is 1000 watts, so an appliance operating at 2 kW transfers 2000 J each second.
Paper 5, Paper 6
The unit of power. One watt is a transfer rate of one joule per second: .
The unit of power. One watt means one joule of energy is transferred each second: .
Convert time to seconds before substituting: multiply minutes by 60. Convert kilowatts to watts by multiplying by 1000.
In , the italic symbol means work done, measured in joules. The unit symbol W means watts.
For power calculations, convert time to seconds and give the answer in watts (W).
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