Calculate the Drift Velocity of Electrons
A copper wire of cross-sectional area 1.2 mm^2 carries a current of 1.4 A. If the number density in the wire is 8.5 X 1028 electrons /m^3, calculate the drift velocity of electrons.
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drift vel = v
electron density = N = 8.5 * 10^28 /m^3
i = 1.4 A
A = 1.2 mm^2 = 1.2 * 10^-6 m^2
In One second, v*1*A*N electrons cross a cross section in the wire.
so i = 1.4 = v * 1 * 1.2 * 10^-6 * 8.5 * 10^28 * 1.6 * 10^-19 Amp
v = 0.085 mm/sec
electron density = N = 8.5 * 10^28 /m^3
i = 1.4 A
A = 1.2 mm^2 = 1.2 * 10^-6 m^2
In One second, v*1*A*N electrons cross a cross section in the wire.
so i = 1.4 = v * 1 * 1.2 * 10^-6 * 8.5 * 10^28 * 1.6 * 10^-19 Amp
v = 0.085 mm/sec
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