# is my solution correct ..

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#### transgalactic

##### Banned
here is a question:
http://i25.tinypic.com/8xlcfl.gif
there is endless wire uniformly charged $\lambda=2*10^{-4}C/m$
and close to it located a wire with $l=0.12_m$
which has 30 degree angle between him and the endless wire,and it charged in uniformed way so that the total charge on it is $q=3*10^{-9}$
the distance of the finite wire and the infinite wire is 0.08 meters

A.find the total force acted on the finite wire.
B.find it when $\alpha=0$degrees and when $\alpha=90$degrees.

gaus law for infinite wire i presume its length is l and distance r.
$E2\pi r h=\frac{q}{\epsilon_0}\\$
$E=\frac{q}{\epsilon_0 2\pi r h}=\frac{\lambda h}{\epsilon_0 2\pi r h}=\frac{\lambda }{\epsilon_0 2\pi r }\\$
$\frac{q_2}{l_2}=\lambda_2\\$
$l_0=l_2\cos \alpha\\$
$\int_{0}^{l_0}Edl=\int_{0}^{l_0}\frac{\lambda }{\epsilon_0 2\pi r }dl$

i sum along the finite wire
but the ditance from the infinite changes too.
so it should be a double integral
but its not a 2d body

??

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