1. The problem statement, all variables and given/known data If an uncharged parallel-plate capacitor (capacitance C) is connected to a battery, one plate becomes negatively charged as electrons move to the plate face (area A). The depth d from which the electrons come in the plate in a particular capacitor is plotted against a range of values for the potential difference V of the battery. When d is one picometre, the potential difference is 20V. The gradient is equal to 5x10-14. What is the ratio C/A. 2. Relevant equations q=ε₀EA q=CV 3. The attempt at a solution I combined the above two equations to get the expressions C/A=ε₀/D However that doesn't provide me with a numerical solution for the ratio C/A. Can anyone please help?