A thin cylindrical shell of radius R1 = 5.0 cm is surrounded by a second cylindrical shell of radius R2 = 9.0 cm, as in Fig. 22-34. Both cylinders are 3.0 m long. The inner one carries a total charge of Q1 = -3.8 µC. The outer one carries a total charge of Q2 = +2.2 µC. (Assume the positive direction is away from the axis.) http://img.photobucket.com/albums/v225/Fanman22/22-34.gif [Broken] For points far from the ends of the cylinders, determine the electric field at the following radial distances from the central axis. (a) r = 1.5 cm ________ N/C (b) r = 6.5 cm ________ N/C (c) r = 10.5 cm _________ N/C I think E=0 when R is less than R1...and for R greater than R1, i think the formula might be E=chargedensity/2*pi*epsilon*R Am I even close?