1. The problem statement, all variables and given/known data An infinitely long solid insulating cylinder of radius a = 4.3 cm is positioned with its symmetry axis along the z-axis as shown. The cylinder is uniformly charged with a charge density ρ = 28 μC/m3. Concentric with the cylinder is a cylindrical conducting shell of inner radius b = 10.1 cm, and outer radius c = 12.1 cm. The conducting shell has a linear charge density λ = -0.34μC/m. 1) What is Ey(R), the y-component of the electric field at point R, located a distance d = 48 cm from the origin along the y-axis as shown? 2. Relevant equations ρ = Qin/V V = 2πRL (Disregard L if I take it at 1m) λ = Qout/L (L @ 1m) so λ = Q Gauss - ∫E⋅dA = Qenclosed/∈0 Agauss = 2πRa < May be area of confusion 3. The attempt at a solution Qin = 2π(.043)(28x10-6 = 7.56495X10-6 Qout = λ = -.34x10-6 Qnet = 7.22495x10-6 E = (Qnet4πk)/2πRd = 270935.816619 N/C I think I might be having trouble determining where to place the outside of the Gaussian surface. I'm assuming the different fields are at: -outside of outer conductor -with in conductor = 0 -at inner surface of conducting shell -between conductor and inner insulator -surface of inner insulator -and within the inner insulator I think I remember seeing something different, but I'm not sure. I blasted through a similar problem last night, and somehow finished the section on Gauss' law but now I seem to have forgotten everything.