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

This is a http://session.masteringphysics.com/problemAsset/1003223/45/14677_a.jpg" [Broken] of the problem

-I know that the direction of the electric field at any point on the z-axis is parallel to the z-axis

E = k*q/r^2

http://session.masteringphysics.com/problemAsset/1003223/45/1003223B2.jpg" [Broken]

dE = k* dq/(a^2+z^2)

dE_{z}= (z/(sqrt(a^2+z^2)) *dE

3. The attempt at a solution

So, I need to find the magnitude of the electric field along the positive z axis.

Basically, everything up there was work from previous parts of the problem. Now, I think I just need to put the last two expressions together in order to integrate around the ring (I think with respect to q), but I'm not sure. I need a little help on this last step.

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# Homework Help: Electric field of a charged ring

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