A current of 16 A is made to pass through a conductor in which the number of density of free electrons is `4xx10^(28)m^(-3)` and its area of cross section is`10^(-5)m^(2)`. The average drift cross section is `10^(-5)m^(2)`. The average drift velocity of free electrons in the conductor is

Options

A. `1.6xx10^(-4)ms^(-1)`
B. `2.5xx10^(-4)ms^(-1)`
C. `6.4xx10^(-4)ms^(-1)`
D. `3.2xx10^(-4)ms^(-1)`

Answer

B

Explanation

`v_(d)=(i)/(n eA)`