Problem 2.15 a thick spherical shell caries charge density p- asrsb) fig. 2.25). find the electric field in the three regions: (6)r < a, (i) a b.

Problem 2.15 A thick spherical shell caries charge density p- asrsb) Fig. 2.25). Find the electric field in the three regions: (6)r < a, (i) a b. Plot |E] as a function of r, for the case b = 2a.