- #1

Bipolarity

- 775

- 2

Now if J,n,e are all constants then the drift speed ##v_{d}## will also be a constant. But this appears to not make sense to me given the fact that electrons are expected to constantly accelerate since the electric field continues to act on the electron as it is conducted along the wire. For instance, if a force constantly acts on you in some direction, you won't just drift in that direction, you will accelerate! So how can the drift speed not be dependent on the time you have spent in motion?

Under this argument it would make sense that ## v_{d} = ta ## where a is the acceleration of the electron, which is constant if the field E is constant, and t where t is the total time the electron has spent in motion.

But it turns out t is actually the mean free time (average time between two electron collisions). So what's the deal here?

BiP