Chapter 22, Problem 42P

(II) An uncharged solid conducting sphere of radius r₀ contains two spherical cavities of radii r₁ and r₂, respectively. Point charge Q₁ is then placed within the cavity of radius r₁ and point charge Q₂ is placed within the cavity of radius r₂ (Fig. 22–38). Determine the resulting electric field (magnitude and direction) at locations outside the solid sphere (r > r₀), where r is the distance from its center.

FIGURE 22–38 Problem 42.