Today we are going to calculate the electric field of two concentric non-conducting charged cylinders (separated by a neutral insulator) of infinite length in all regions of space. We will be using Gauss' Law to do so, and as usual we need to understand the symmetries of the physical set up to set up Gauss' Law correctly. Recall Ganss' Law is where the integral is over any closed surface. (1) Before we consider the entire problem we will consider a simpler problem to shod some light on the symmetries of the physical set up. So consider an infinitely long line of charge represented by the long line in the figure (the dashes indicate the line goes to infinity). Draw the electric field lines at each of the labeled points in the figure. . C A