(23-22) A hollow spherical conductor, carrying a net charge +Q, has inner radius r_1 and outer radiu

(23-22) A hollow spherical conductor, carrying a net charge +Q, has inner radius r_1 and outer radius r_2=2r_1 (Fig. 23-26). At the center of the sphere is a point charge +Q/2. (a) Write the electric field strength E in all three regions as a function of r. Then determine the potential as a function of r, the distance from the center, for (b) r larger than r_2, (c) [r_1, r_2], and (d) [0, r_1]. (e) Plot both V and E as a function of r from r=0 to r=2r_2.

[cisrs]

part d is wrong, first electric field is directing outside so, E in integrals must be negative, else clculation are wrong