A) \[711\,\,\mu F\]
B) \[611\,\,\mu F\]
C) \[811\,\,\mu F\]
D) \[511\,\,\mu F\]
Correct Answer: A
Solution :
Here: diameter of earth \[=12.8\times {{10}^{3}}km\] So, radius\[R=\frac{12.8}{2}\times {{10}^{3}}\] \[=6.4\times {{10}^{3}}km\] Capacity\[C=4\pi {{\varepsilon }_{0}}R=6.4\times {{10}^{6}}m\] \[=\frac{1}{9\times {{10}^{9}}}\times 6.4\times {{10}^{6}}\] \[=711\times {{10}^{-6}}F=711\,\,\mu F\]
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