A slab of insulating material has thickness 2d and is oriented so that its faces are parallel to the yz-plane and given by the planes x=d and x=−d. The y- and z-dimensions of the slab are very large compared to d and may be treated as essentially infinite. The slab has a uniform positive charge density ρ. find magnitude of the electric field due to the slab at the points 0≤x ≤d. and magnitude of the electric field due to the slab at the points x≥d Equations: Gauss's Law (too hard to type) So i was working through this and am stuck about the area and charge. I doesn't give charge and am i just to assume that the height of the cylinder i choose is just arbitrary z?