Find the magnitude E of the electric field at a distance from the axis of the cylinder for r < ro. Remember that we've chosen the label / to represent the length of the cylindrical Gaussian surface. Express your answer in terms of some or all of variables p, r, To, I, and 0. E = pr 20 If you repeated your calculation from Part C for r = ro, you would find that the magnitude of the electric field on the surface of the rod is To Esurface = Pa 20 Now rewrite the expression for Esurface in terms of X, the linear charge density on the rod. Express your answer in terms of X, ro, and 0. Your answer should not contain the variable Esurface I'VD, , , reset shortcuts? help P.