(a) SiDIJe Sheet
A surface charge sheet of infinite extent in the '1 = 0 plane has a uniform surface charge density (To as in Figure 2-12a. We break the sheet into many incrementa1 line charges of thickness dx with dA = (To th. We could equivalently break the surface into incremental horizontal line charges of thickness dz. Each incremental line charge alone has a radial field component as given by (5) that in Cartesian coordinates results in " and J components. Consider the line charge dA I, a distance" to the left of P, and the symmetrically placed line charge dA 2 the same distance" to the right of P. The" componenu of the resultant fields cancel while the J