CBSE Physics 11+12 Reference · Ch 3 · P1

Physics

Problem

An aluminium wire of cross-sectional area

A = 2.0\text{ mm}^2 = 2.0\times10^{-6}\text{ m}^2

carries a steady current

I = 3.0\text{ A}

. The free-electron density in aluminium is

n = 6.0\times10^{28}\text{ m}^{-3}

and

e = 1.6\times10^{-19}\text{ C}

. Find the drift speed

v_d

of the conduction electrons.