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Homework Help: Internal resistance

  1. Apr 4, 2006 #1
    In this equation I r= E-V/V*R

    How would I find R? thanks in advance you your help.
  2. jcsd
  3. Apr 4, 2006 #2


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    Staff: Mentor

    What do you mean? Are you asking about how to do the algebraic manipulations? And where are the parens in your equation?
  4. Apr 4, 2006 #3
    Oops. r= (E-V/v)*R

    This equation shows that knowing the emf E, the voltmeter's reading of the terminal voltatge V, and the resistance of the voltmeter R, the unknown internal resistance r of the battery can be computed.

    I'm trying to find r. I know E,AND V. But I don't know how to find R.
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