Question

A solid, insulating sphere of radius a has a uniform charge densityof ? and a total charge of Q. Concentric with this sphere is anuncharged, conducting hollow sphere whose inner and outer radii areb and c.

(a) Find the magnitude of the electric field in the followingregions.
r < a (Use the following as necessary: ?, e0, and r.)

a < r < b (Use the following as necessary: Q, e0, p, andr.)

b < r < c (Use the following as necessary: Q, e0, p, andr.)

r > c (Use the following as necessary: Q, e0, p, and r.)

(b) Determine the induced charge per unit area on the inner andouter surfaces of the hollow sphere.

inner surface

outer surface