Problem:A long cylinder of diameter 2a has a charge per unit length,

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Problem:A long cylinder of diameter 2a has a charge per unit length, lambda, that is uniformly distributed down a very long wire. The cross section of the cylinder is not uniform, with a small hole drilled into it, which has a center at r = R and a diameter of 2b. Find an expression for the electric field outside this surface at a distance r = 3a/2.

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