A) \[3.3\times {{10}^{-10}}\text{F}\]
B) \[2\times {{10}^{-9}}\text{F}\]
C) \[2\text{F}\]
D) \[\text{18F}\]
Correct Answer: B
Solution :
Capacity of spherical condenser is \[C=4\pi {{\varepsilon }_{0}}\frac{Kab}{b-a}\] \[=\frac{6\times 0.5\times 0.6}{9\times {{10}^{9}}(0.6-0.5)}\] \[=\frac{1.8}{0.9\times {{10}^{9}}}=2\times {{10}^{-9}}F\]
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