What is the Temperature of the Oven?

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SUMMARY

The discussion centers on calculating the temperature of an oven based on the change in resistance of a copper wire. The initial resistance at 20 degrees Celsius is 0.8 ohms, and the resistance increases to 1.2 ohms in the oven. The relevant formula used is R = Ro[1 + α(Tf - Ti)], where α represents the temperature coefficient of resistivity. Participants express confusion regarding the application of this formula without knowing the wire's length and cross-sectional area.

PREREQUISITES
  • Understanding of electrical resistance and its relationship to temperature.
  • Familiarity with the formula R = Ro[1 + α(Tf - Ti)].
  • Knowledge of the temperature coefficient of resistivity for copper.
  • Basic algebra skills for manipulating equations.
NEXT STEPS
  • Research the temperature coefficient of resistivity for copper.
  • Learn how to derive resistivity from resistance, length, and cross-sectional area.
  • Explore practical applications of resistance-temperature relationships in materials science.
  • Study examples of resistance calculations in varying temperatures for different materials.
USEFUL FOR

Students in physics or engineering courses, educators teaching electrical properties, and anyone interested in the thermal properties of materials.

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...
 
Physics news on Phys.org
The relevant formula is true for resistance also.
R = Ro[1 + α(Tf - Ti)]
 

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