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Question about potential difference.

  1. Sep 19, 2010 #1
    yesturday I read in a book that it is not correct to say that p.d is the work done in moving a unit charge between the points concerned i can not understand that point please explain that!
  2. jcsd
  3. Sep 19, 2010 #2
    Emf is the work done by a Source in moving a unit charge across a circuit. P.D. is energy dissipated by some component in a circuit (e.g. resistor). Its like energy going in:emf and energy going out:pd.
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