### Step 5: Set up the integral

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In setting up the integral we wish to express all factors entering the electric field contribution as functions of the integration variable *x*.
After finding the magnitude of the infinitesimal contribution to the field,
we consider its projection along the vertical axis.
After the integrand is determined, we evaluate the integral between the limits of integration.

"http://www.physics.udel.edu/~watson/phys208/lineofcharge/lineofcharge5.html"

Last updated Sept. 24, 1997.

Copyright George Watson, Univ. of Delaware, 1997.