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Physics_101

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## Homework Statement

Imagine a cylinder of radius R and Length L. Both of it's ends are open and it carries a uniform surface charge desnity of sigma (@) Find the electric potential at any point along the axis of the cylinder, and then use that to calculate the electric field at any point.

## Homework Equations

## The Attempt at a Solution

Essentially the way you are supposed to do this problem (I think) is to assume the tube is just a bunch of stacked line charges (rings), and then find the potential from a ring, and then integrate from 0 to L or something, I'm having real trouble doing so however, any help out there?

Thanks