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)`.

Answer

`0.75 mms^(-1)`

Explanation

`upsilon_(d) = (I)/(nAe)`
`(2.7)/((9 xx 10^(28)) xx (2.5 xx 10^(-7)) xx (1.6xx 10^(-19)))`
`= 0.75 xx 10^(-3)ms^(-1) = 0.75 "mms"^(-1)`