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Work done in bringing a charge from infinite.

  1. Aug 3, 2012 #1
    1. The problem statement, all variables and given/known data
    3 charges, A,B, and C are located at the vertices of an equilateral triangle. Point P is at the center of the triangle, and is 8 cm from each charge. Charge A is +7 μC. Charge B is +6 μC. Charge C is -10μC. If a 4μC charge is brought from infinite to point P, how much work was done in moving this charge to point p.


    2. Relevant equations
    W=fd
    F= Kq1q2/r2


    3. The attempt at a solution
    I think you're supposed to use w=fd. And i can get the force with coulombs law, but i don't understand the charge being brought from infinite.
     
  2. jcsd
  3. Aug 3, 2012 #2

    SammyS

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    How is electric potential related to potential energy?

    How is the change in potential energy related to work done?
     
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