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Finding E-field at a point away from a line charge

  1. Feb 4, 2016 #1
    1. The problem statement, all variables and given/known data
    A line charge with a uniform linear charge density Lambda lies along the x-axis and extends from -∞ to 0. Determine the X-component, and Y-component of the E-field at a point P, a distance 'a' from the origin on the positive y-axis.

    2. Relevant equations
    dE= (k*dq/r^2)* r(hat)

    3. The attempt at a solution
    I'm getting tripped up on the limits of integration. Is there an x-component of the E-field at point P, even though the point lies on the Y-axis? I was able to calculate the Y-component and got Ey= (Q/L)/(4ε0a)
  2. jcsd
  3. Feb 4, 2016 #2


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    Yes, there is an x-component.
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