[SOLVED] Capacitors: Explain result from experiment 1. The problem statement, all variables and given/known data I made an experiment today at school with a parallel plate capacitor. I induced 100 V and increased the distance between the plates. I measured the charge and calculated the capacitance of the capacitor, which of course got smaller when the distance got bigger. Now the thing is: When I calculate the capacitance theoretically (using C = K*A/d), where A is the area of the plate, I get values for the capacitance, which are a lot smaller than the measured values when the distance is very "large". Why is that? I would think it would have to be something like the plates are getting discharged the further they are apart.