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Charges of the amount 45 nC/m (charge per length) are deposited at the surface of a...

Charges of the amount 45 nC/m (charge per length) are deposited at the surface of a long, straight metal wire of diameter = 2 mm in which the surrounding media is air.

(a) Which electric field and potential distribution exists around the wire ?
(b) How large is the electric field and the surface charge density at the wire's surface ?

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