A spherical conductor of radius $12\; cm$ has a charge of $1.6 \times 10^{−7}\;C$ distributed uniformly on its surface. What is the electric field just outside the sphere ?

Question

$\begin{array}{1 1} 10^5\;NC^{-1} \\ 10^7\;NC^{-1} \\ 1NC^{-1} \\ 7\;NC^{-1} \end{array}$