Question

A uniformly charged ball of radius a and charge- Part A is at the center of a hollow metal shell with inner radius b and outer radius c. The hollow sphere has net charge +20 Determine the electric field strength in the region r < a. Give your answer as a multiple of Q/eo Express your answer in terms of some or all of the variables a, c, r, and the constant π Submit ▼ Part B Determine the electric field strength in the region a<T<b. Give your answer as a multiple of Express your answer in terms of some or all of the variables a, , C, r, and the constant π

Need help with parts A, B, and D

Answer 1

From Gauss law, The electric flux is, ε,A a)For rša the charge is negative so the field is inward From the gauss law 4 E(4) The volume charge density is, 4 Therefore, 4 4πε b)Now applying gauss law for the region a<r<b E(47)--0

d)From the gauss law for the region, r>C Oim The net charge on the shell is, On 20-0-0 E 4T1 E-