Main Question or Discussion Point
the general definition of capacitance is that if you have an arrangement of two conductors, and you put a charge +Q on one and -Q on the other, and a potential difference of V results between them, the capacitance is Q/V. But what if the charges on each conductor don't have the same magnitude, say +Q and -Q/2? Is there any way to measure the capacitance from this setup? Or, given the capacitance for the normal case, could you derive the potential difference that will result here?