VP21.10.4 Positive charge Q is distributed uniformly along a rod of length L that lies along the x-axis from x = L to x = 2L. Find (a) how much charge is contained within a segment of the rod of length dx, (b) the x- and y-components of the infinitesimal electric field caused at the origin (x =0) by one such segment at coordinate x, and (c) the x- and y-components of the total electric field caused at the origin by the rod