A) 10 A
B) \[10\sqrt{2}\,A\]
C) 20 A
D) \[20\sqrt{2}\,A\]
Correct Answer: B
Solution :
\[P=\frac{1}{2}\,{{V}_{0}}{{i}_{0}}\cos \phi \,\,\Rightarrow \,\,1000=\frac{1}{2}\,\times \,200\times \,\,{{i}_{0}}\cos \,60{}^\circ \] \[\Rightarrow \,\,\,{{i}_{0}}=20\,A\,\,\Rightarrow \,\,{{i}_{rms}}=\frac{{{i}_{0}}}{\sqrt{2}}\,=\frac{20}{\sqrt{2}}=10\sqrt{2}\,A\]
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