a
(a) Electric field due to a hollow spherical conductor is governed by following equation \(E = 0,\) for \(r < R\) ...\((i)\)
and \(E = \frac{Q}{{4\pi {\varepsilon _0}{r^2}}}\) for \(r \ge R\) ....\((ii)\)
i.e. inside the conductor field will be zero and outside the conductor will vary according to \(E \propto \frac{1}{{{r^2}}}\)