Define commercial unit of energy.Relate it to the SI unit of energy
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Energy = Joule
Power= Energy÷ Time
Energy = Power × Time
= kwh
1kwh= 3.6×10 ki power 6 Joule
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Commercial Unit of Energy. The SI unit joule is too small to express very large quantities of energy. Hence we use a bigger unit called kilowatt hour (kWh) to express energy. 1 kWh is the amount of energy consumed by an electrical gadget in one hour at the rate of 1000 J/s or 1kW.
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