Consider a system of a metallic ball with net charge q and radius Ri enclosed by a spherically symmetric metallic shell with net charge 92, inner radius R2 and outer radius Ra . If q% is the charge on the outside surface of the shell and o2 the charge on its inside surface, then q2 + 92 = q2 . 92 92 91 R1- O R2 R3 Find the potential at B. Note that B is inside the metal of the thick spherical shell. Define the distance from O to B as b.O 1. V. = 2k O 2. Vg = V2k 92