A) \[1.5\times {{10}^{-8}}\text{J}\]
B) \[2.5\times {{10}^{-7}}\text{J}\]
C) \[3.5\times {{10}^{-5}}\text{J}\]
D) \[4.5\times {{10}^{-2}}\text{J}\]
Correct Answer: A
Solution :
Given, \[C=12pF=12\times {{10}^{-12}}F,\] \[V=50volt\] \[\therefore \]Potential energy \[(U)=\frac{1}{2}C{{V}^{2}}\] \[=\frac{1}{2}\times 12\times {{10}^{-12}}\times {{(50)}^{2}}\] \[=6\times {{10}^{-12}}\times 2500\] \[=1.5\times {{10}^{-8}}J\]
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