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Homework Help: Find the current by adding the resistances

  1. Feb 13, 2008 #1
    1. The problem statement, all variables and given/known data

    http://i260.photobucket.com/albums/ii10/alexlovely77/af.jpg [Broken]
    2. Relevant equations


    3. The attempt at a solution

    i just want help with 1 of the 3 (anyone...)
    so the first one...the current thru the capacitors is 0
    then u have to find voltage right?
    but how do u find the voltage thru those resistors?
    r the 3 resistors in series? or do the capacitors make them not in series?
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Feb 13, 2008 #2


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    Staff Emeritus
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    Gold Member

    In the first, the resistors form a simple series circuit. Find the current by adding the resistances, then apply Ohms law. Once you have the current you can find the voltage drop across each resistor. This will give you the voltage seen by the capacitors.

    In the second you can easily find the current in each branch of the parallel circuit. You can then find the voltage at each end of the cap. The difference is the voltage used to find the charge.
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