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Homework Help: The electric field of a ring

  1. Feb 14, 2012 #1
    1. The problem statement, all variables and given/known data
    Show that the maximum magnitude Emax of the electric field along the axis of a uniformly charged ring occurs at x=a/(sqrt2) and has the value Q/(6(sqrt3)πε0a2)


    2. Relevant equations
    E=keΔq/r2


    3. The attempt at a solution
    I made the vertical components cancel along the axis from the top and bottom of the ring so that I just have the x-axis field, but I really don't know what else to do. I'm not even sure if that equation is the right one to use. This question seems to be made deliberately confusing.
     
  2. jcsd
  3. Feb 14, 2012 #2

    ehild

    User Avatar
    Homework Helper

    Show your work in detail, please.

    ehild
     
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