A constant voltage is applied across a wire of constant length then how drigt velocity of electrons depends on area of cross-section of wire.

Explanation

`v_(d)=muE,mu`=mobility of free electrons `=(er)/(m )` and E=electric field =`(V)/(L)`
so `v_(d)=mu(V)/( L)` : here `mu` is constant.
If V and L is constant then `v_(d)` does not depends on area.