A long, thin straight wire with linear charge density l
Chapter 24, Problem 24.76(choose chapter or problem)
A long, thin straight wire with linear charge density l runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2l. Assume l is positive. Find expressions for the electric field strength (a) inside the cylinder, r 6 R, and (b) outside the cylinder, r 7 R. In what direction does the electric field point in each of the cases?
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