• question_answer The capacitance of a spherical conductor with radius 1m is A) $9\times {{10}^{-9}}F$ B)  $1\,\mu F$ C)  $1.1\times {{10}^{-10}}F$ D)  $1\times {{10}^{-6}}F$

The capacitance of spherical conductor is given by $C=4\pi {{\varepsilon }_{0}}r$ here,$r=1m,\,4\pi {{\varepsilon }_{0}}=\frac{1}{9\times {{10}^{9}}}$ $\therefore$ $C=\frac{1}{9\times {{10}^{9}}}\times 1$ $=1.1\times {{10}^{-10}}F$