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Homework Help: Electric field question

  1. Sep 5, 2010 #1
    1. The problem statement, all variables and given/known data
    Positive charge Q is distributed uniformly along the positive y-axis between y = 0 and y = a.
    Calculate the x- and y-components of the electric field produced by the charge distribution Q at points on the positive x-axis.

    3. The attempt at a solution
    I tried integrating but im unsure of what i should be integrating with respect to what, so i dont necessarily need the answers but if someone could point me in the right direction I would really appreciate it.
  2. jcsd
  3. Sep 5, 2010 #2


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    Science Advisor
    Homework Helper

    Let's first look at a somewhat simpler situation.
    Suppose you have a point charge Q/2 at (0, 0), and a point charge Q/2 at (0, a).
    Can you calculate (both components of) the electric field at (x, 0) when x > 0?

    Once you solved that, can you do it for n point charges of magnitude Q/n, at positions (0, 0), (0, a/n), (0, 2a/n), ... (0, a) ?
  4. Sep 5, 2010 #3
    Alright i got it, thank you very much
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