Consider an insulating solid sphere of radius a with a uniform volume charge density, ρ < 0, is placed concentric with an insulating spherical shell, of inner radius a and outer radius b, with a uniform charge density ρ > 0. Calculate the electric field at a distance r from the common center of the two spheres for a) 0b.

Consider an insulating solid sphere of radius a with a uniform volume charge density, ρ < 0, is placed concentric with an insulating spherical shell, of inner radius a and outer radius b, with a uniform charge density ρ > 0. Calculate the electric field at a distance r from the common center of the two spheres for a) 0b.