An aluminum wire of radius 1.50 mm carries a uniform current of 3.88 AWhat is the drift speed of the electrons in the wire? (the number of mobile electrons per unit volume 7.66 x 1028)
For this problem, use the formula for current density J I / A nqvSolve for the drift velocity by using v I / AnqThe area is π x (0.0015 m)? or 7.07 x 10^-6 m?v 3.88 A / [ (7.07 x 10^-6 m?) x (7.66 x 10^28 electrons / m^3) x (1.60 x 10^-19 C) ] 4.48 x 10^-5 m/s
