The charge is then concentrically surrounded by two uncharged conducting hemispheres of inner radius b = 0.40 m and outer radius c = 0.50 m, which are joined together as shown above, forming a spherical capacitor. A wire is connected from the outer sphere to ground, then removed.
(b) Determine the magnitude of the electric field in the following regions as a function of distance r from the center of the inner sphere.