1. The problem statement, all variables and given/known data 4.10.4 Thin Slab Let some charge be uniformly distributed throughout the volume of a large planar slab of plastic of thickness d. The charge density is ρ. The mid-plane of the slab is the y-z plane. (a) What is the electric field at a distance from the mid-plane when |x| < d/2? (b) What is the electric field at a distance from the mid-plane when |x| > d/2? [Hint: put part of your Gaussian surface where the electric field is zero.] 2. Relevant equations E = σ/2ε0. 3. The attempt at a solution So in vector form the electric field will be negative in the - x direction and positive in the +x direction. This isn't a homework assignment. They're course notes with sample problems. I don't really have any ideas how to go about this so any hints would be great like.