Unit of power — task. Physics CBSE Live product, Class 10 (2025-26).

What is the standard commercial unit used to measure electrical energy? Express it in joules.

The commercial unit of electrical energy is .

\begin{array}{l} 1 kilowatt hour = i kilowatt \times i hour \\ = i kW \times (i \times i) s \\ = i W \times i s \\ = i \times 10^{i} J \end{array}

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5. Unit of power