An infinite plate with thickness 2h is parallel with the x−z plane so that its midpoint (the point halfway through the plate) is at y = 0. (that way all the points on one surface have y = +h and on the other y = −h.) the plate is uniformly charged with volume charge density +rho. sketch the electric field lines. using a cylinder of height 2y and base area a as a gaussian surface, find the magnitude of the ele