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Homework Help: Centre of charge ?

  1. Feb 28, 2006 #1
    if i have 3 unequal point charges located on the vertices of an equilateral triangle then can i assume the whole charge to be concentrated at one point to represent the whole system ? i.e one can assume the entire charge to be concentrated at that point for the purpose of calculating the electric field intensity ? can we derive a general expression for coordinates of center of charge like center of mass ?
  2. jcsd
  3. Feb 28, 2006 #2


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    The electric field of a collection of individual charges is the vector sum of the electric field of each charge.

    At large distances, the electric field approaches that which would be given by a point charge of the magnitude of the total charge.

    Yes - a coordinate system is a key part.
  4. Feb 28, 2006 #3
    thanx a lot sir ..........
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