- #1

Seraph404

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## Homework Statement

This is a http://session.masteringphysics.com/problemAsset/1003223/45/14677_a.jpg" 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"

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

dE

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

## 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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