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Homework Help: Potential Difference

  1. Jul 19, 2008 #1
    What is the potential difference between two equal charge/line charge/ring charge? Is it zero everywhere, or only in middle of the two?
  2. jcsd
  3. Jul 19, 2008 #2


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    Before you start talking about potential you have to fix where the zero is and that's arbitrary. But you certainly can't make it zero everywhere in the cases you are talking about.
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