Resistance temperature

  • Thread starter lha08
  • Start date
  • #1
lha08
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Homework Statement


The resistance of a copper wire is 0.8 ohms at 20 degrees Celsius. When it is placed in an oven, its resistance is 1.2 ohms. What is the temperature of the oven?


Homework Equations


resistivity = resistivity (initial) [1+ (temperature coefficient of resistivity)X (Tf-Ti)]


The Attempt at a Solution


I don't even know where to start..like I have the two resistance but then I don't know what to do with them...I can't plug them into the other formulas for resistivity because I don't have the length and area to find the resistivity for the different resistance values...
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
9
The relevant formula is true for resistance also.
R = Ro[1 + α(Tf - Ti)]
 

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