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Homework Help: Emf battery with resistor

  1. Jul 28, 2010 #1
    1. The problem statement, all variables and given/known data
    The question itself doesn't make sense to me, it says to find emf but the answer box has V=
    problem is an attachment.

    2. Relevant equations

    3. The attempt at a solution
    If it wants voltage thats simple P=I^2R P=V^2/R V=54.8V if it wants emf I need some pointers ...... Thanks for any help

    Attached Files:

    • PF.png
      File size:
      19.5 KB
  2. jcsd
  3. Jul 28, 2010 #2
    Dont worry - - solved V is emf
  4. Jul 29, 2010 #3
    Here emf is the voltage difference
  5. Jul 29, 2010 #4
    If a battery has no internal resistance, its EMF and its voltage are the same thing.
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