A) \[{{10}^{-5}}J\]
B) \[{{10}^{-6}}J\]
C) \[{{10}^{-7}}J\]
D) \[{{10}^{-4}}J\]
Correct Answer: B
Solution :
\[C=400\times {{10}^{-12}}F\] \[V=100\,V\] Initially energy stored\[=\frac{1}{2}C{{V}^{2}}\] \[=\frac{1}{2}400\times {{10}^{-12}}\times {{({{10}^{2}})}^{2}}\] \[=\frac{1}{2}\times 4\times {{10}^{-10}}\times {{10}^{4}}\] \[\Rightarrow \] \[Q=CV=4\times {{10}^{-10}}\times 100\] \[=4\times {{10}^{-8}}C\] \[\Rightarrow \]By again connecting the charged capacitor with a uncharged ideal capacitor. \[\Rightarrow \]You need to login to perform this action.
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