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Homework Help: Method for solving this

  1. Feb 20, 2005 #1
    Hi, I don't want help solving this problem, just a method to complete it without using calculus. Here it is:

    A thin glass rod is bent into a semicircle of radius r. A charge +q is uniformly distributed along the upper half, and a charge -q is uniformly distributed along the lower half. Find the magnitude and direction of the electric field E at the center of the semicircle. (which is the center of a normal circle if one existed in this problem)

    The key for me is, how to solve without using calculus, if that is possible. Thanks.
  2. jcsd
  3. Feb 20, 2005 #2

    Andrew Mason

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    Science Advisor
    Homework Helper

    Use Gauss' law.
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