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!

Electric field in a ball

  1. Apr 26, 2012 #1
    1. The problem statement, all variables and given/known data

    Positive charge Q uniformly distributed in a ball with radius R, which is located at the beginning of X axis. Positive point charge Q is located on the X axis on R=2. what is the size of the electric field in R/2?


    2. Relevant equations



    3. The attempt at a solution

    i've tried to use the equations of electric field, K*(Q/r^2), once put the distance of charge Q with R=3/2, adding it to the electric field of the ball on the point, which is K*(Q/a^3), as a=0.5R. but the correct answer is K*(1/18)*(Q/r^2). where do i go wrong?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 26, 2012 #2
    Are you sure that the problem says on the axis at R=2, not X=2R? The wording of the problem you put up is really bad, maybe you could post exactly what the problem you were given says.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Electric field in a ball
  1. Electric field of ball (Replies: 1)

Loading...