A long, nonconducting, solid cylinder of radius 3.0 cm has a nonuniform volume charge density rho that is a function of radial distance r from the cylinder axis: rho = Ar2. For A = 3.4 µC/m5, what is the magnitude of the electric field at (a) r = 1.4 cm and (b) r = 4.8 cm. A long, nonconducting, solid cylinder of radius 3.0 cm has a nonuniform volume charge density rho that is a function of radial distance r from the cylinder axis: rho = Ar2. For A = 3.4 µC/m5, what is the magnitude of the electric field at (a) r = 1.4 cm and (b) r = 4.8 cm.