An infinitely long solid cylinder of outer radius a is coaxial with the z-axis and has uniform volume charge density P.
An infnitely long, thin shell of radius 3a has uniform surface charge density S and is also coaxial with the z-axis.
Answer the following in terms of symbols given: a P,S and constants of nature. draw a picture.
a) What is the magnitude of the electric field at a distance a/2 from the z-axis?
b) What is the magnitude of the electric field at a distance 2a from the z-axis?
c) What is the magnitude of the electric field at a distance 4a form the z-axis?