Question

Drift velocity varies with the intensity of electric field as per the relation

Answer 1

Applying an electric field adds to this random motion a small net flow in one direction; this is the drift. Drift velocity is proportional to current. In a resistive material it is also proportional to the magnitude of an external electric field. Thus Ohm's law can be explained in terms of drift velocity.

Answer 2

$\huge{\underline{\underline{\mathfrak{Answer}}}}$

Current , I = neAv d

Current density , J = AI = nev d

​Also , current density J is related to electric field Eby the relation

J=σE

Therefore ,

nev d = J=σE

Hence , v d αE .