A) \[4C\]
B) \[2C\]
C) \[\frac{C}{2}\]
D) \[\frac{C}{4}\]
Correct Answer: B
Solution :
\[C=\frac{{{\varepsilon }_{0}}A}{d}.\,C'=\frac{{{\varepsilon }_{0}}A}{d/2}\] Þ \[8{{r}^{3}}={{R}^{3}}\]
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