Here's my problem: A parallel-plate air capacitor has a capacitance of 730 picoFarads. The charge on each plate is 2.95 microCoulombs. a) What is the potential difference between the plates? I used the equation V=Q/C to get 2.4746E-4 V, but this is incorrect. b)If the charge is kept constant, what will be the potential difference between the plates if the separation is tripled? I think it would be divided by three. c) How much work is required to triple the separation? U=1/2 Q V I think if I could calculate the potential difference correctly, I could work the rest of the problem. Any hints/help would be welcome!!!