Question

How does the drift velocity of electrons in a metallic conductor change,if the length of the conductor is doubled by stretching it, keeping the applied potential difference constant? ​

Answer 1

Hey Buddy

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.