Two parallel non conducting rings

AI Thread Summary
Two parallel nonconducting rings with uniform charges q1 and q2 are positioned along a common axis, separated by a distance of 3.00R. The electric field magnitudes at point P on this axis have a ratio of 2.87, leading to the need to find the charge ratio q1/q2. The equations for the electric fields E1 and E2 are provided, but clarification is sought regarding the location of point P and the variable d. The discussion emphasizes the importance of understanding the setup and equations to derive the charge ratio effectively. Overall, the challenge lies in applying the electric field equations to find the desired ratio.
SOS2012
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Homework Statement



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?

Homework Equations


The Attempt at a Solution

 
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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:
 


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 don't know how i would use them in order to get the ratio of q1/q2
 
(where is P, and what is d ? :confused:)

why can't you find q1/q2 just by dividing?​
 
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