A copper wire has a circular cross section with a radius of 1.75 mm. The equatio

Question

A copper wire has a circular cross section with a radius of 1.75 mm. The equation for drift velocity is given below.

(b) All other things being equal, what happens to the drift speed in wires made of metal having a larger number of conduction electrons per atom than copper? Explain.

vd = I/ nqA A copper wire has a circular cross section with a radius of 1.75 mm. The equation for drift velocity is given below. vd = I/ nqA (a) If the wire carries a current of 3.10 A, find the drift speed of the electrons in the wire. (n = 8.46 A copper wire has a circular cross section with a x 1028 electrons/m) Answer in m/s (b) All other things being equal, what happens to the drift speed in wires made of metal having a larger number of conduction electrons per atom than copper? Explain.

Explanation / Answer

Vd = i/neA

Vd = 3.1/((8.46*10^28)*(1.6*10^-19)*(3.14*0.00175*0.00175))

vd = 2.38 *10^-5 m/s
--------------------------------

as Vd is inversly prop to n

if n increases, Vd decreases

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