Q78 / 270 · NDA 2021 (Phase 1) · General Ability

Which one of the following formulas does not represent electrical power?

A
$I^2 R$
Correct answer
B
$I R^2$
C
$V I$
D
$V^2 / R$

Solution

Electric power, $\mathrm{P}=\mathrm{VI}=\mathrm{I}^2 \mathrm{R}=\frac{\mathrm{V}^2}{\mathrm{R}}$ $[\because \mathrm{V}=\mathrm{RI}$ from ohm's law]

Hence, the correct answer is option: 'B'.

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