Okay, so I think I would calculate a) as if it was a radius enclosed in the small cylinder. I'm assume the E is perpendicular to the curved surface. I'm not sure how to determine if the field is perpendicular to the curved surface or the flat circles.
b) I would calculate it as a radius...
Homework Statement
A very long solid nonconducting cylinger of radius R1 is uniformly charged with a charge density of volume charge densty pE. It is surrounded by a concentric cylinder tube of inner radius R2 and outer radius R3.
Determine the electric field as a function of the distance R...