A) \[250\,J\]
B) \[750\,J\]
C) \[1225J\]
D) \[1475J\]
Correct Answer: D
Solution :
Energy \[=\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}\times (A\times d)\]\[=\frac{1}{2}{{\varepsilon }_{0}}\left( \frac{{{V}^{2}}}{{{d}^{2}}} \right)\,Ad\] \[=\frac{1}{2}\times \frac{8.85\times {{10}^{-12}}\times {{({{10}^{5}})}^{2}}\times 25\times {{10}^{6}}}{0.75\times {{10}^{3}}}=1475J\]
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