What is the Potential Inside a Homogeneous Resistor?

[likephysics]

Homework Statement

Determine the potential $$\phi$$ inside a resistor of length l and radius a.
Also determine the current density J, resistance R, surface and volume charge density P_e and P_es. The resistor is homogeneous.

Homework Equations

The Attempt at a Solution

V=Ed, d=l here
V=El
E = J/$$\sigma$$
So V= J/$$\sigma$$ l ?

 

[likephysics]

Anyone?

 

[diazona]

With your attempt so far, you can find the electric field. Then use that to compute the potential difference between one end of the resistor and a point somewhere in the middle. That should get you started.