A) 104 watt
B) 10 watt
C) 2.5 watt
D) 5 watt
Correct Answer: C
Solution :
\[P={{V}_{r.m.s.}}\times {{i}_{r.m.s.}}\times \cos \varphi \]\[=\frac{100}{\sqrt{2}}\times \frac{100\times {{10}^{-3}}}{\sqrt{2}}\times \cos \frac{\pi }{3}\] \[=\frac{{{10}^{4}}\times {{10}^{-3}}}{2}\times \frac{1}{2}=\frac{10}{4}=2.5\ watt\]You need to login to perform this action.
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