Find the resistivity constant homework

1. Feb 27, 2010

lha08

1. The problem statement, all variables and given/known data
The conductance G of a device is defined to be the inverse of its resistance, G=1/R. What is the conductance of a device through which the current is 2 A when a potential difference of 60 V is applied?

2. Relevant equations
R= V/I
R= (resistivity)X (length)/Area

3. The attempt at a solution
I first found the resistance by using the first equation, and got 30 ohms but then I get stuck...because I don't see any other formulas that that uses resistance that allows me to find the resistivity constant...and I don't have the length and area for the second equation..

2. Feb 27, 2010

ideasrule

Re: Resistance

Why do you need the resistivity constant? Don't you just need to find the conductance, which is 1/R?

3. Feb 27, 2010

lha08

Re: Resistance

but don't i need the resistivity constant to find that to do find the conductance?

4. Feb 27, 2010

ideasrule

Re: Resistance

The conductance is defined in the question as 1/R, where R is resistance.

5. Feb 27, 2010

lha08

Re: Resistance

Ohh!! I'm so stupid I didn't even read the question properly...:grumpy:
Thanks for clearing things up