1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook