- #1

weresquid

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## Homework Statement

Line A extends from (2,2, 0) to (-2, 2, 0) and line B extends from (2, -2, 0) to (-2, -2, 0). Each has a linear charge density ρl = 1 nC / m. You want to calculate the magnitude and direction of the electric field due to the two line charges for all points on the z-axis.

a.) Sketch the charge distribution, and set up the integrals you need in order to

solve this problem. Indicate the vector R for each line charge on your plot,

and determine expressions for R and R

^{3}

b.) Prove that the magnitude of the electric field in the x and y directions is

zero.

## Homework Equations

See pdf attachment.

## The Attempt at a Solution

So far I've tried doing the integration technique shown in the attached pdf (this was a class example) and I am not quite sure if that's correct since there are no Z components. Also this problem is with two line charges and not one... so I guess I am basically having trouble finding out where to start? Any help is appreciated.