Question

1. When a current flows in an aluminum wire of diameter 4.67 mm, the drift speed of the conduction electrons is 0.000135 m/s. How many electrons are flowing past a given point each second? The conduction electron density in aluminum is 6.00×1028 m−3.

2. When a current flows in an aluminum wire of diameter 2.15 mm, the drift speed of the conduction electrons is 0.000249 m/s. How many electrons are flowing past a given point each second? The conduction electron density in aluminum is 6.00×1028 m−3.

Answer 1

Electric Current I = nAv_{​​​​d} e

And electric current I = charge flowing / time = Q/t

But charge Q = Ne from quantization of charge

= Integral of fundamental charge

​​​​​​Ans. 8.6 *10^19 electrons.

a PAGE DATE diometer d = 4.67 mm iraclius ra da. Area of cross section Ach d² 4 - 3.1483.672 mm2 4 = 10.57x10 m2 drift velocity to = 0.000175m40 21-252104 als na 6.00 61028 m3 plestron nember densiy current flowing I = have charge flowing per second But corrent Ne. where N - no. of electrone flowing pos seus second Ne = nave N = NAVA 6 4 2 = 6.00 x 10 x 10.57810 85.Guxio 18 is the number of electrons flowing through given point por decond

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