A) T, 5T, 9T
B) \[\frac{T}{2},\frac{5T}{2},\frac{9T}{2}\]
C) 0, T, 2T, 3T
D) \[0,\frac{T}{2},T,\frac{3T}{2}\]
Correct Answer: D
Solution :
Total time period, \[T=\frac{1}{v}=\frac{1}{159.24}\] \[=6\,.\,28\,ms\] Total charge on capacitor at time \[Q'=Q\cos \frac{2\pi }{T}t\]. For energy stored in electrical, we can write \[Q'=\pm Q\]. Hence, energy stored in the capacitor is completely electrical at, \[t=0,\,\frac{T}{2},\,T,\,\frac{3T}{2}\].
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