Two parallel non conducting rings

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Homework Help Overview

The problem involves two parallel nonconducting rings with uniform charges, separated by a specific distance. The objective is to determine the ratio of the charge magnitudes based on the electric field magnitudes at a point along their common axis.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the relationship between the electric fields of the two rings and question the location of point P and the meaning of variable d. There is an attempt to derive equations for the electric fields but uncertainty remains about how to proceed with finding the charge ratio.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the problem setup and exploring the equations provided. Some guidance has been offered regarding the potential for a direct division to find the charge ratio, but no consensus has been reached on the approach.

Contextual Notes

There are questions about the definitions of point P and the variable d, which may affect the understanding of the problem. Participants are encouraged to clarify these aspects to facilitate further discussion.

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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