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Homework Help: Point Charges and Static Electricity Problem

  1. Aug 31, 2011 #1
    Hi! I am having a tough time with this question, and would just like some clarification if thats at all possible! I feel I may just be missing a key concept, however, any help is appreciated! Thanks.

    1. The problem statement, all variables and given/known data
    Point x is .25 m away from a point charge of +4.7*10^-8 C, point Y is .65 m away. What is the potential of point X with respect to point Y?

    2. Relevant equations
    Ep=(kQ1Q2)/d

    Where k= 9.0*10^9
    And Ep is the electric potential difference

    3. The attempt at a solution
    Solve Ep for each individually (Points x and y)

    Point Y
    Ep=(9.0*10^9)(+4.7*10^-8)/(.65)
    =650.77V

    Point X
    Ep=(9.0*10^9)(+4.7*10^-8)/(.25)
    =16581.8V

    Point X-Point Y = 15930.83V
     
  2. jcsd
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