1. Not finding help here? Sign up for a free 30min 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!

Question on Circuits with Dielectric Problem

  1. Feb 9, 2008 #1
    Circuits with Dielectric Problem

    1. The problem statement, all variables and given/known data
    [​IMG]
    The dielectric added has the value of 3.67.
    [​IMG]


    2. Relevant equations
    C=Q/V
    C'=kC
    Series: 1/C=1/C1+1/C2...
    Parallel: C=C1+C2...


    3. The attempt at a solution
    So, I can find the normal voltage and charge with the dielectric in, but once the battery is removed, I am lost as to how everything balances out.

    Let the capacitors be numbered: 1 for the top left, 2 for the top right, and 3 for the bottom.
    Let Cxy be the total capacitance of x and y.
    C12 = 1/(1/3.48 + 1/(3.67*8.8))
    Removing the dielectric:
    C12' = 1/(1/3.48 + 1/8.8)
    Since V123 = V12, Q12 = C12' * V12

    But this is not correct. Any tips on how everything balances out when you remove the dielectric?

    Thanks.
     
    Last edited: Feb 9, 2008
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Question on Circuits with Dielectric Problem
Loading...