A) 440 W
B) 220 W
C) 30 W
D) 55 W
E) 1000 W
Correct Answer: C
Solution :
\[{{E}_{0}}=220\,V\] \[\therefore \] \[{{E}_{rms}}=\frac{220}{\sqrt{2}}\] \[{{i}_{0}}=\frac{{{E}_{0}}}{Z}\] \[{{i}_{0}}=\frac{220}{110}=2A\] \[\Rightarrow \] \[{{i}_{rms}}=\frac{2}{\sqrt{2}}\] Power \[={{E}_{rms}}\times {{i}_{rms}}\times \cos \phi \] \[=\frac{200}{\sqrt{2}}\times \frac{2}{\sqrt{2}}\times \cos 60{}^\circ \] \[=\frac{200}{\sqrt{2}}\times \frac{2}{\sqrt{2}}\times \cos 60{}^\circ \]You need to login to perform this action.
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