(a) Show that the work done to remove the charge q from a distance r > a to infinity against the force, Eq. (2.6), of a grounded conducting sphere is

Relate this result to the electrostatic potential, Eq. (2.3), and the energy discussion of Section 1.11. (b) Repeat the calculation of the work done to remove the charge q against the force, Eq. (2.9), of an isolated charged conducting sphere. Show that the work done is

Relate the work to the electrostatic potential, Eq. (2.8), and the energy discussion of Section1.11.

q*a - a) 8(- )