(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hi,

Having some trouble with answering this question:

A thin nonconducting rod with a uniform distribution of +'ve charge 'Q' is bent into a circle of radius R. There is an axis, 'z' which originates in the center of this ring.

In terms of 'R', at what +'ve value of z is that magnitude maximum?

I'm not precisely sure what this question is asking (slightly ambiguous), however i'm assuming it's asking where the electric field due to this ring is at a maximum. Any help is appreciated!

2. Relevant equations

E = (q*z*K)/(Z^2 + R^2)^(3/2)

E = F/Q

Where K = 1/(4*Pi*E(naught))

3. The attempt at a solution

I have determined z in terms of R to be

z = R/Tan(Pi/2 - Theta)

Where 'Theta is the angle of elevation between the 'point' on z and the edge of the ring.

Thanks!

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# Homework Help: Location of maximum electric field due to a ring of charge?

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