# Question #0bc47

Apr 15, 2017

$C = \frac{Q}{V} \textcolor{red}{= \text{ const}}$

For a given capacitor, if Q changes, then V must change in order to keep C constant.

C is a feature of the geometry and material properties of the capacitor.

For a PPC, the common formulation is: $C = \frac{\varepsilon A}{d}$