A hollow spherical conductor, carrying a net charge +Q, has

inner radius r1 and outer radius r2=2r1 (see the figure (Figure

1)). At the center of the sphere is a point charge +Q/2. Plot V as

a function of r from r=0 to r=2r2. Assume V0=3Q8πϵ0r2.

inner radius r1 and outer radius r2=2r1 (see the figure (Figure

1)). At the center of the sphere is a point charge +Q/2. Plot V as

a function of r from r=0 to r=2r2. Assume V0=3Q8πϵ0r2.