1. Not finding help here? Sign up for a free 30min 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!

Zero point in the electric field

  1. Feb 7, 2013 #1
    1. The problem statement, all variables and given/known data

    Find positions on the x axis for the charges Q1 = -1 C and Q2 = +3 C so that the electric field is zero at x = 0.

    2. Relevant equations

    F=Eq
    where E=kq/r^2

    3. The attempt at a solution
    I put q1 and q2 1 meter apart and then found where a third charge would go so the third charge would have a force of zero. My answer for the question is q2 at x=-2.366 and q1 at x=-1.366. Is this right?
     
  2. jcsd
  3. Feb 7, 2013 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Yes, that is one possible answer. (There are an infinite number of sets of possible answers.)

    The important thing is the ratio of the two x coordinates.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook