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!

Please help -Capacitors in series and parallel

  1. Jun 28, 2011 #1

    CR9

    User Avatar

    Please help :( -Capacitors in series and parallel

    1. The problem statement, all variables and given/known data
    Find the relationship between C and C1 to make C equivalent= C

    The diagram is as shown below:-
    Code (Text):


                                               C1
                   A---------------------------||----
                                            |                |
                                             =C1            = C
                                            |                |
                    B---------------------------------
     
    2. Relevant equations
    C parallel= C1 + C2 + C3......
    1/C series= 1/C1 + 1/C2 + 1/C3


    3. The attempt at a solution

    So on the right most of the diagram, C1 and C are in series, hence their combined capacitor is C1(C)/C1+C. And since the combined capacitor is in parallel with the other C1, C equivalent is C1(C)/C1+C + C1 = C

    However, I can't seem to solve that particular equation by making C as the subject....

    Please help..

    The answer provided by the textbook is:
    C=C1 (1+ square root of 5) / 2

    Thanks...
     
    Last edited by a moderator: Jun 29, 2011
  2. jcsd
  3. Jun 28, 2011 #2

    CR9

    User Avatar

    Re: Please help :( -Capacitors in series and parallel

    I guess my diagram is messed up even though i tried to fixed it, but yeah,

    C1 is in series with C

    and those two combined are in parallel with C1.....
     
  4. Jun 29, 2011 #3

    gneill

    User Avatar

    Staff: Mentor

    Re: Please help :( -Capacitors in series and parallel

    Let's see some of the mathematical steps you've taken to try to solve for C.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Please help -Capacitors in series and parallel
  1. Series + Parallel (Replies: 6)

Loading...