Hi, I have the following theoretic setup: A cap of size C Farad is connected between nodes A and B and loaded with a specific charge (e.g. +10 on side A, -10 on side B). In the next step, i disconnect side B and before doing that, "magically" (see footnote) a charge of -3 gets injected on plate B. Since node A is not (yet) floating, it will supply a charge of +3 and the cap is loaded with +/-13 charges now. Node B is floating now (not connected to anywhere). Now I so the same with with node A: -3 charges get injected and then the node is disconnected (floating). At node A, there are now +10 charges (+13 and -3) and on side B -13 chages. Since both nodes are floating, no node can supply charges to get the thing in equilibrium. First of all, at node A, will the three electrons (-3) "recombine" with 3 of the +10 positive charges or not? What is the voltage across the cap? I assume that on one side, excess charge will move as far away as they can (to a hypothetic other cap plate) because the cap requires same absolute charges on both sides. Thanks divB footnote: The setup are ideal NMOS switches which have a certain charge (-6 in the example above) in the channel. When the MOS switches infinitely fast from on to off, about -3 charges will go to one side and -3 charges will be injected at the cap plates.