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Electric Charges

  1. Oct 7, 2007 #1
    Two point charges, q1 = 4.0×10-6 C and q2 = -1.0×10-6 C, are located on the x axis at x1 = -1.0 cm and x2 = 3.0 cm.

    (a) Determine the electric field at the origin.

    (b) Determine the x coordinate of a point on the positive x axis where the electric field is zero; i.e., a test charge placed at this point would experience no force.

    3. The attempt at a solution

    I have no idea
  2. jcsd
  3. Oct 7, 2007 #2
    OK, I solved part a) and found the electric field at the origin.

    Can someone help me with part b), I really don't have a clue on how to solve this other than setting F = 0 (which may not be necessary anyway).
  4. Oct 7, 2007 #3
    I am really interested in what this answer would be, as I have thought about it a lot. Could someone please guide me to the answer?
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