A straight round copper conductor of radius `R = 5.0 mm` carries a current `I = 50 A` Find the potentail difference between the axis of the conductor

A straight round copper conductor of radius `R = 5.0 mm` carries a current `I = 50 A` Find the potentail difference between the axis of the conductor
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A straight round copper conductor of radius `R = 5.0 mm` carries a current `I = 50 A` Find the potentail difference ... to `n = 0.9.10^(33) cm^(-3)`.
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