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E Field perpendicular to a rod

  1. Feb 14, 2009 #1
    1. The problem statement, all variables and given/known data
    A rod of length 0.1m has a uniform linear charge density of 3C/m. Determine the Electric field at a point d=P located at a perpendicular distance 1m along a line of symmetry of the rod.

    3. The attempt at a solution
    I know i have to use super position and integrate but I don't think I'm using the right integration.

    I was trying 2[tex]\lambda[/tex]L[tex]\oint[/tex][tex]\frac{ddl}{ (L^2 + d^2)^3/2}[/tex]
  2. jcsd
  3. Feb 14, 2009 #2
    it should be (L^2 + d^2) to the 3/2 power. and it is integrated from 0 to 1/2. and lamba is the linear charge density, L is length of rod, d is distance normal to rod
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