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Homework Help: Electric potential problem ?

  1. Oct 26, 2006 #1
    A positive charge Q between two charge , a positive charge and a negative charge .Now I want to find the electric potential at the positive charge Q due to both the charges . The problem I am facing is do I need to minus the
    electric potential due to charge positive with the electric potential due to charge negative . I have this problem because the electric potential is a scalar quantity , so if I minus it , it will look like it is a vector quantity .So do I need to minus it or add it together ?
  2. jcsd
  3. Oct 27, 2006 #2
    Because Potential is a scalar quantitu , Vnet=V(+) + V(-) , that is summation of potential at that point due to positive charge + potential at that point due to negative charge , while writing the potential terms take the charge +Q or -Q as the case maybe...
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