Drift Speed of the Conduction Electrons

[Ayesh]

Homework Statement

An aluminum wire with a diameter of 0.100 mm has a uniform electric field of 0.200 V/m imposed along its entire length. The temperature of the wire is 50.0 C.

a) Determine resistivity
b) Current density
c) Total current
d) Drift speed of the conduction electrons

Homework Equations

p=p₀[1+ alpha (T-T₀)]
A=\prodd²/4
J=I/A
n=#carriers/volume
I=nqAVd
V=EL
Volume=AL

The Attempt at a Solution

I had no difficulties finding the answers from a) to c) but at d) I can't find it.
A friend of mine told me I had to find the length first, but I tried to find with with all the formulas I have but I can't seem to get anywhere.

 

[noel_xxiv]

do you have the answer??

 

[noel_xxiv]

we have the same question

 

[ehild]

What do the symbols I, n, q, A, V, d mean in the equation I=nqAVd?

ehild