How Fast Do Electrons Drift in a Silicon Resistor?

[de1337ed]

Problem:

An Si resistor is at 300Kelvin, and is 100μm long, 1μm thick, 5μm wide. The conductivity is 7.128 Ωcm. The resistance is 28058Ω. A voltage of 5v is applied. What is the drift velocity of the electrons, given that n = 1.01x10³?
Other constants:
μ_n = 1350 cm²/Vsec
μ_p = 450 cm²/Vsec
---
My work:
So basically,
I have the formula J_n,drift = qn(μ_nE).
The question asks for drift velocity, does that mean I'm trying to find J_n,drift or just the mobility factor μ_nE? What exactly is J_n,drift? In either scenario, how do I find E field if I'm only given a voltage? It's not like I can integrate b/c Voltage is constant through the resistor.
I was also considering using I = nqv_dA. But I was getting some outrageous velocity with this.
Ideas?
Thank you.

 

[nasu]

Problem:

An Si resistor is at 300Kelvin, and is 100μm long, 1μm thick, 5μm wide. The conductivity is 7.128 Ωcm. The resistance is 28058Ω. A voltage of 5v is applied. What is the drift velocity of the electrons, given that n = 1.01x10³?
Other constants:
μ_n = 1350 cm²/Vsec
μ_p = 450 cm²/Vsec
---
My work:
So basically,
I have the formula J_n,drift = qn(μ_nE).
The question asks for drift velocity, does that mean I'm trying to find J_n,drift or just the mobility factor μ_nE? What exactly is J_n,drift? In either scenario, how do I find E field if I'm only given a voltage? It's not like I can integrate b/c Voltage is constant through the resistor.
I was also considering using I = nqv_dA. But I was getting some outrageous velocity with this.
Ideas?
Thank you.

J_n,drift is probably the drift current of negative carriers (electrons). In a semiconductor you may have also drift current of holes as well as diffusion currents of both types of carriers.