A) \[2.77\times {{10}^{-8}}\,J\]
B) \[1.77\times {{10}^{-8}}\,J\]
C) \[2.35\times {{10}^{-8}}\,J\]
D) \[1.35\times {{10}^{-8}}\,J\]
Correct Answer: A
Solution :
Electrostatic energy \[U=\frac{1}{2}C{{V}^{2}}\] \[=\frac{1}{2}(15\times {{10}^{-12}})\times {{(60)}^{2}}\] \[=\frac{1}{2}\times 15\times 36\times {{10}^{-12}}\times {{10}^{2}}\] \[=270\times {{10}^{-10}}\] \[=2.70\times {{10}^{-8}}\,J\]
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