Chapter 5, Problem 5.29P

A coaxial conductor has radii a=0.8mm and b=3 mm and a polystyrene dielectric for which ${\epsilon }_r=\mathrm{2.56.}{\text{If P= (2/p)a}}_{\text{p}}nC/m^2$ in the dielectric, find (a) D and E as function of p; (b) V_ab and γ_e.(c) If there are 4Ă—10¹⁹ molecules per cubic meter In the dielectric, find p(p).