A) \[\frac{{{V}_{0}}}{\sqrt{2}}\,\frac{{{I}_{0}}}{\sqrt{2}}\,\cos \,\phi \]
B) \[{{V}_{0}}{{I}_{0}}\cos \phi \]
C) \[\frac{{{V}_{0}}{{I}_{0}}}{4}\,\cos \phi \]
D) None of these
Correct Answer: A
Solution :
\[P={{V}_{rms}}.{{I}_{rms}}.\cos \phi \] \[=\frac{{{V}_{0}}}{\sqrt{2}}.\frac{{{I}_{0}}}{\sqrt{2}}.\cos \phi \]
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