Homework Help: Conductivity homework problem help

1. Nov 7, 2009

weston_sagle

1. The problem statement, all variables and given/known data
At what temperature does a carbon resistor have a resistance of 995 ohms, if it has a resistance of 1000 ohms at 20 degrees? What is its conductivity at the new temperature?

2. Relevant equations

3. The attempt at a solution
I don't even know where to start.

2. Nov 7, 2009

buffordboy23

Re: Conductivity..

Do you have any equations that relate the change of some property (e.g. resistivity) of a conductor with temperature changes?

3. Nov 7, 2009

weston_sagle

Re: Conductivity..

Well, the situation isn't ideal. We recently got a new teacher, after our old teacher canceled 2 weeks of classes. Now we are trying to catch up so we have an assignment on material we haven't covered. I also have no textbook for the class. I did google searches but could only find R= conductivity*L/A but I don't have length or area.

4. Nov 7, 2009

buffordboy23

Re: Conductivity..