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Homework Help: Finding Potential Energy

  1. Feb 9, 2012 #1
    Find the potential energy of a charge q= 1mC at the centre of the square made of 4 charged rods of L =20cm and Q=1mC each.

    3. The attempt at a solution
    I am having quite a bit of trouble with this question, the problem is I don't really know where to start. I feel once i get on the right path I will be able to get it.
  2. jcsd
  3. Feb 9, 2012 #2


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    Homework Helper

    Let's start with this: do you know any formulas involving the potential energy?
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