33.(a) We use a Gaussian surface in the form of a box with rectangular sides. The cross section is shownwith dashed lines in the diagram below. It is centered at the central plane of the slab, so the left andright faces are each a distancexfrom the central plane. We take the thickness of the rectangularsolid to bea, the same as its length, so the left and right faces are squares. The electric Feld isnormal to the left and right faces and is uniform over them. Ifρis positive, it points outward atboth faces: toward the left at the left face and toward the right at the right face. ±urthermore, themagnitude is the same at both faces. The electric ﬂux through each of these faces isEa2. The Feldis parallel to the other faces of the Gaussian surface and the ﬂux through them is zero. The total
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.