1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Equivalent capacitance

  1. Nov 19, 2006 #1

    The "C"s stand for capacitor.
    The capacitance of C2 is 10 μF and others are 4 μF.

    The book contains neither the answer nor solution.

    I tried to apply Kirchhoff's Loop Rule:
    q_4 / 4 + q_2 /10 + q_3 / 4 = 0
    q_1 / 4 + q_2 /10 + q_5 / 4 = 0
    q_1 + q_4 + q_3 + q_5 = 0

    Then I got the equivalent capacitance=0. What is the problem with my argument?
  2. jcsd
  3. Nov 19, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper

    My guess is you have a sign problem. It's not obvious to me that you have assumed one sign for the voltage drop across each capacitor and used it consistently. In fact, it looks very much like you have not. There must be some additional equations based on charge conservation.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Equivalent capacitance
  1. Equivalent capacitance (Replies: 7)

  2. Equivalent capacitance (Replies: 4)

  3. Equivalent Capacitance (Replies: 6)

  4. Equivalent Capacitance (Replies: 7)