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Homework Help: Internal resistance

  1. Sep 24, 2008 #1
    1. The problem statement, all variables and given/known data

    A battery having an emf of 9.30 V delivers 103 mA when connected to a 60.0 ohms load. Determine the internal resistance of the battery.

    2. Relevant equations

    V = E - IR

    3. The attempt at a solution

    i plugged in 9.3 for V, .103 for I, and 60, for R.... and i got 15.48. red x... any suggestions?
  2. jcsd
  3. Sep 24, 2008 #2


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    Homework Helper

    What's wrong with just V = IR ?

    If you know what the Total Resistance is and it's in series with the 60 ohm resistor ...
  4. Sep 24, 2008 #3
    i dont understand what you mean. I dont know the relationship between R and internal resistance. and internal resistance is sooo not in my text book.. im def confused
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