Chapter 22, Problem 29P

(II) Suppose the nonconducting sphere of Example 22–4 has a spherical cavity of radius r₁ centered at the sphere’s center (Fig. 22–32). Assuming the charge Q is distributed uniformly in the “shell” (between r = r₁ and r = r₀), determine the electric field as a function of r for (a) 0 < r < r₁, (b) r₁ < r < r₀, and (c) r > r₀.