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Finding terminal voltage given two batteries

  1. Mar 3, 2013 #1
    1. The problem statement, all variables and given/known data
    I was given this circuit and told that R=6.6Ω. Based on the information, I was asked to find the terminal voltage.

    2. Relevant equations
    Terminal V=Emf-ir
    Kirchoff's laws

    3. The attempt at a solution
    I used Kirchoff's laws to find i=.61 A. From there, I don't understand how to find terminal voltage without knowing internal resistance. I feel like I wasn't taught an equation or something.
  2. jcsd
  3. Mar 3, 2013 #2


    User Avatar

    Staff: Mentor

    It looks like your circuit shows two batteries each with an internal resistance. So what "terminal voltage" is being referred to?
  4. Mar 3, 2013 #3
    Man, I realized that as soon as I looked at the diagram again. I factored in the two given resistances as the internal ones and it worked out perfectly. Thanks anyway!
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