A) \[5\,\mu \,F\]
B) \[10\,\mu \,F\]
C) \[20\,\mu \,F\]
D) \[40\,\mu \,F\]
Correct Answer: C
Solution :
\[C\propto \frac{1}{d}\Rightarrow \frac{{{C}_{1}}}{{{C}_{2}}}=\frac{{{d}_{2}}}{{{d}_{1}}}\] so \[\frac{{{C}_{2}}}{10}=\frac{8}{4}\Rightarrow {{C}_{2}}=20\mu F\]
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