One kilowatt hour is defined as :

Power consumed when a device of power 1 kW is used for 1 h

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Work done or energy consumed when a device of power 1 kW is used for 1 h

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Force utilized when a device of power 1 kW is used for 1 h

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Energy dissipated when a device of power 1 kW is used for 1 h

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Solution

The correct option is B
Work done or energy consumed when a device of power 1 kW is used for 1 h

One kilowatt-hour is equal to the work done or energy consumed when a device of power 1 kW is used for 1 hour.

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