2. Use Gauss's law to find the electric field inside a uniformly charged solid sphere (charge density p). 3. A thick spherical shell carries charge density k p = (a≤r≤b) (a) Find the total charge Q (b) Find the electric field and electric potential in the three regions: (i) r < a, (ii) a < r < b, (iii) r>b, write your solution as the expressions of r and Q (c) Plot | Ẻ | and V as a function of r (d) Discuss the limit of Ę field when when a → b