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Electric Potentials

  1. Feb 19, 2008 #1
    1. The problem statement, all variables and given/known data

    There is a +1 micro-coulomb charge at the origin and a -3 micro-coulomb charge at 2 meters away along the x-axis. I am suppose to find the change in Voltage if second charge is moved to 4 meters away from the origin.

    2. Relevant equations

    I am thinking of using delta V= - integral of E(x)dx , where the limits of integration is from 2 to 4.

    3. The attempt at a solution

    i am not sure why the negative three micro-coulomb isn't included when using this equation. can someone explain why?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 20, 2008 #2
    Well I'll tell you're over complicating it. Pretty much the only equation you need is electric potential = somestuff / r

    You don't even need to know what the somestuff is, only that potential is inversely proportional to r
     
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