1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution 1) charges should remain the same since there is no path for them to go anyway. 2) Now, if the panels were of infinite length, I believe the electric field should be the same regardless of distance? But in this case, the panels aren't infinitely long so there are sharp edges at each end and electric fields are stronger at sharp edges so I believe the answer should be : electric field increases. 3) using V=Ed , if d decreases and E increases... I have no idea then because it would depend on the magnitudes of d and E.