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Electric field due to a charged particle at a random point in space

  1. May 8, 2014 #1
    Can we calculate the electric field at any given point in space even if there are no charged particles there? The equation for electric field given in a standard EM course is kqq0/q0r^2 where q0 is a test charged impacted by the electric field. How about just any point in space?
     
  2. jcsd
  3. May 8, 2014 #2

    jtbell

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    Staff: Mentor

    No, that's the equation for the electric force acting on q0.

    The electric field produced by the source charge q, at the location of q0, is E = kq/r2, regardless of whether q0 is actually at that location or not.

    When you put q0 at that location, it experiences a force F = q0E.
     
  4. May 8, 2014 #3
    I think I posted an equation for an electric field as I included q0 in both nominator and denominator, and thanks for explaining, I thought so.
     
  5. May 8, 2014 #4

    jtbell

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    Staff: Mentor

    Oops, I saw the q0 in the numerator but missed the one in the denominator. :blushing:
     
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