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!

Finding terminal voltage given two batteries

  1. Mar 3, 2013 #1
    1. The problem statement, all variables and given/known data
    http://www.webassign.net/giancoli5/19_31alt.gif
    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

    gneill

    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!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted