How does the drift velocity of electrons in a metallic conductor change if the length of the conductor is doubled and the applied voltage is kept constant ?

drift velocity:vd=eEtao/m   where, tao(?)=relaxation time,e=charge of one electron, E=electric field

E=V/l   V=potential difference, l=length of conductor

so,

vd=eEtao/m =eV?/ml

so
if the length of the conductor is doubled and the applied voltage is kept constant,

then the drift velocity of electrons in a metallic conductor will be half as drift vel of electrons are inversely proportional to the length of the conductor.