A conductor wire having `10^(29)` free electrons/`m^(3)` carries a current of 20 A.If the cross-section of the wire is 1 `mm^(2)`,then the drift velocity of electrons will be (e=`1.6xx10^(-19)C`)

Options

A. `6.25xx10^(-3)ms^(-1)`
B. `1.25xx10^(-5)ms^(-1)`
C. `1.25xx10^(-3)ms^(-1)`
D. `1.25xx10^(-4)ms^(-1)`

Answer

C