Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area `1.0xx10^(-7)m^(2)` carrying a current of `1.5A`. Assume the density of conduction electrons to be `9xx10^(28)m^(-3)`.

Explanation

Average drift speed of electrons is given by `V_(d) = (I)/(n eA) = (1.5)/(9 xx 10^(28) xx 1.6 xx 10^(-19) xx 1 xx 10^(-7))m//s`
`=(1.5)/(14.4) xx 10^(-2) m//s`
`V_(d) = 1.04 xx 10^(-3) m//s`