Estimate the average drift velocity of conduction electrons in a copper wire of cross-sectional area `2.5 xx 10^(-7) m^(2)`, carrying a current of 2.7 A. Assume the density of conduction electrons to be `9 xx 10^(28) m^(-3)`.

Explanation

We know, `VD=I//nqA`
`=(2.7)/(9xx10^(28)xx1.6xx10^(-19)xx2.5xx10^(-7))=7.5xx10^(-4)ms^(-1)`
This is required average drift velocity.