• # question_answer The capacitance of a spherical conductor with radius 1 m is: A)  $9\times {{10}^{-9}}F$       B)  $1\,\mu F$ C)  $2.5\times {{10}^{-10}}F$     D)  $1\times {{10}^{-6}}F$

The capacitance of spherical conductor is given by          $C=4\pi {{\varepsilon }_{0}}r$ Here: $r=1\text{ }m,\,4\pi {{\varepsilon }_{0}}=\frac{1}{9\times {{10}^{9}}}$ $C=\frac{1}{4\times {{10}^{9}}}\times 1$ $C=2.5\times {{10}^{-10}}F$