# Drift Speed of the Conduction Electrons

1. Nov 1, 2010

### Ayesh

1. The problem statement, all variables and given/known data

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

2. Relevant equations

p=p0[1+ alpha (T-T0)]
A=$$\prod$$d2/4
J=I/A
n=#carriers/volume
I=nqAVd
V=EL
Volume=AL

3. 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.

2. Jan 31, 2011

### noel_xxiv

3. Jan 31, 2011

### noel_xxiv

we have the same question

4. Jan 31, 2011

### ehild

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

ehild