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Homework Help: Point charge voltages

  1. Apr 1, 2012 #1
    1. The problem statement, all variables and given/known data

    Two equal point charges of magnitude 4.0 μC are situated along the x-axis at x1=-2.0m and x2= 2.0m. What is the electric potential at the origin of the xy coordinate system?

    2. Relevant equations

    ΔV= Kc (q/r)

    3. The attempt at a solution

    Do voltages cancel each other out at the mid point or do they add up?
  2. jcsd
  3. Apr 1, 2012 #2


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    hi freeofwork! :smile:
    (can't they do both? :wink:)

    voltage is (electric) potential energy per charge, and so can be positive or negative

    energies add (as scalars), so voltages do also :smile:
  4. Apr 1, 2012 #3
    so its not zero right?
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