Answer: A long, straight wire has fixed negative charge
Chapter , Problem 27(choose chapter or problem)
A long, straight wire has fixed negative charge with a linear charge density of magnitude 3.6 nCim. The wire is to be enclosed by a coaxial, thin-walled nonconducting cylindrical shell of radius 1.5 cm. The shell is to have positive charge on its outside surface with a surface charge density O'that makes the net external electric field zero. Calculate 0'
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