An infinitely lond cylindrical conductor of inner radius "a" and outer radius "b" initially has a positive surface charge density of(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\sigma_{o}[/tex]

on its outer surface. A wire of positive charge per unit length

[tex]\lambda[/tex]

is then placed on the axis of the cylinder. Find the final surface charge densities on its inner and outer surfaces.

So thats the problem. I wasn't really sure how to start. I got the formula for electric feild caused by a straight line charge.

[tex]E=\frac{2k\lambda}{r}[/tex]

but then i wasn't really sure what to do with that... so could someone give me a push in the right direction. Thanks..

gale~

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# Homework Help: Conducting cylinder and wire

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