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Find the resistivity constant homework

  • Thread starter lha08
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  • #1
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Homework Statement


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?


Homework Equations


R= V/I
R= (resistivity)X (length)/Area


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..
 

Answers and Replies

  • #2
ideasrule
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Why do you need the resistivity constant? Don't you just need to find the conductance, which is 1/R?
 
  • #3
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Why do you need the resistivity constant? Don't you just need to find the conductance, which is 1/R?
but don't i need the resistivity constant to find that to do find the conductance?
 
  • #4
ideasrule
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The conductance is defined in the question as 1/R, where R is resistance.
 
  • #5
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The conductance is defined in the question as 1/R, where R is resistance.
Ohh!! I'm so stupid I didn't even read the question properly...:grumpy:
Thanks for clearing things up
 

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