# Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 2.5 × 10−7 m2 carrying a current of 1.8 A. Assume the

density of conduction electrons to be 9 × 1028 m−3.

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density of conduction electrons to be 9 × 1028 m−3.

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Vd= 1.8/ 9x1028 x 1.6x 10-19x 2.5x10-7

Vd= 5x 10-4 m/s

Here n should be 9x 10^28 m^-3