Answer to Question #278543 in Electric Circuits for Ritamoni

Question

The electron drift arises due to the force experienced by electrons in the electric field inside the conductor.

But force should cause acceleration.

Why then do the electrons aquire a steady average drift speed?

Answer 1

(1)Each free electron does accelerate increasing its drift speed after collision but starts to accelerate and increases its drift speed

(2)again only to suffer a collision again and so on on the average, thereofre electrons acquire only a drift speed.

We know that

$F=ma \\F=qE$

Both equation equal

$ma=qE$

$a=\frac{qE}{m}$

$q=-e$

$a=\frac{-eE}{m}$

Drinft velocity

$J=neAv_d$

$V_d=\frac{J}{neA}$