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A standard unit of electricity that is the minimum charged is a kWh. Therefore 1 unit of electricity is equal to 1000watts being used for an hour. eg. A 100w light bulb burning for 10 hours would use 1 kWh which equals 1 unit.

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A 'unit' is short for 'Board of Trade Unit', a government organisation that used to regulate the cost of electrical energy in Britain. A 'unit' is exactly equivalent to a kilowatt hour. Further to your question, though, you do not 'consume power'; you consume 'energy'. So, asking how much power (watts) is consumed by energy (unit) makes absolutely no sense whatsoever.

A unit or kilowatt hour is defined as 'the amount of energy consumed, over a period of one hour, at the rate of one kilowatt'.

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Q: One unit in electricity meter consumes how many watts of power?
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