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Finding the Current in a circuit, with series opposing voltage sources.

  1. Sep 4, 2012 #1
    1. The problem statement, all variables and given/known data
    asd.png
    V1-12V
    V2-9V
    R1-4 Ohms
    R2-7 Ohms
    R3-8 Ohms

    Each current has to be found when the switch (k) is both open and closed.

    2. Relevant equations



    3. The attempt at a solution

    I can find each current when the switch is open, however I'm confused at what would happen when it becomes closed.
     
  2. jcsd
  3. Sep 4, 2012 #2

    ehild

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    Homework Helper
    Gold Member

    Hi Killstudy, welcome to PF. I hope your studies do not kill you.

    The forum rules here says that you need to show your attempts for solving the problem. How did you solve the case with open switch?

    If the switch is closed you have two loops and need to use Kirchhoff' rules.

    ehild
     
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