Equivalent Capacitance of a complex network

Discussion in 'Homework Help' started by Jesinth, Mar 22, 2011.

  1. Jesinth

    Thread Starter New Member

    Mar 22, 2011
    Could someone help to find the equivalent capacitance between AB for the circuit attached (CapacitorNetwork.png). Assume all the capacitors are of same value "C"

    I tried the logic mentioned in
    "http://www.allaboutcircuits.com/vol_1/chpt_7/3.html".. but no luck

    Also if I have a similar resistive network what will be the equivalent resistance.
  2. Adjuster

    Well-Known Member

    Dec 26, 2010
    If the capacitor values are not equal this is a more difficult problem. With all capacitors equal to "C" say, it becomes much easier.

    Try removing C2 from the circuit. What voltage would then appear across the C2 position if a voltage were applied across the ends of the network A and B? (You could do the same thing with the resistor version if that was easier for you.)

    That should answer your question, I think. You might also find that you can re-draw the circuit into a rather more familiar form.

    Edit: If you end up writing a bunch of simultaneous equations, you have missed something.