A) Zero
B) 10 W
C) 5 W
D) 2.5 W
Correct Answer: A
Solution :
\[V=5\cos \omega \,t=5\sin \left( \omega \,t+\frac{\pi }{2} \right)\] and \[i=2\sin \omega \,t\] Power \[={{V}_{r.m.s.}}\times {{i}_{r.m.s.}}\times \cos \varphi \]= 0 (Since \[\varphi =\frac{\pi }{2}\], therefore \[\cos \varphi =\cos \frac{\pi }{2}=0\])
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