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!

Two parallel non conducting rings

  1. May 11, 2012 #1
    1. The problem statement, all variables and given/known data

    Figure 22-42 shows two parallel nonconducting rings with their central axes along a common line. Ring 1 has uniform charge q1 and radius R; ring 2 has uniform charge q2 and the same radius R. The rings are separated by a distance 3.00R. The ratio of the electric field magnitudes of Ring 1 and Ring 2 at point P on the common line is 2.87. What is the ratio of charge magnitudes q1/q2?

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. May 11, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi SOS2012! Welcome to PF! :smile:

    (where is P ? :confused: and try using the X2 button just above the Reply box :wink:)

    Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
     
  4. May 11, 2012 #3
    Re: Welcome to PF!

    E1/E2=2.87

    E1=kq1r/(r^2+r^2)^1.5
    E2=kq2(2r)/(r^2+(d-r)^2)^1.5

    thats the equations i have but i dont know how i would use them in order to get the ratio of q1/q2
     
  5. May 11, 2012 #4

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    (where is P, and what is d ? :confused:)

    why can't you find q1/q2 just by dividing?​
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook