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

total charge Q = 200[nC] is spread along a line from x=−100[mm] to x=+100[mm] .

a) write the dV caused by each dQ=λ dx .

b) integrate along the line of charge ; write V as a function of y .

c) take the derivative with y , to obtain that component of the Electric (vector) field .

d) take the derivative with y , again , to find where (along y-axis) the Ey is maximum

2. Relevant equations

We've used potential energy U=1/2QV...V=kQ/r...that's about it.

3. The attempt at a solution

What I can't get started with is the writing dV caused by each dQ. I'm not even sure what that means. And how can I write V as a function of y and take its derivative if there are no y's in any of these equations?

Any guidance here would be awesome, thanks

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# Homework Help: Integrating a charge along a line

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