Work, Power and Energy — Physics STD 10 — Question
ICSE BoardEnglish MediumSTD 10PhysicsWork, Power and Energy1 Mark
Question
Define kilowatt hour and convert it into joule.
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Answer
Kilowatt hour (kWh) : When an electric power of one kilowatt flows through a conductor for one hour, then the electrical energy which flows through the conductor is one kilowatt hour. $1 kWh=1 kW \times 1 \text { hour }=1000 \frac{J}{s} \times 3600 s=3,600,000 J=3.6 \times 10^6 J= 3 . 6 ~ M J$
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