# Resistance temperature

## 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

rl.bhat
Homework Helper
The relevant formula is true for resistance also.
R = Ro[1 + α(Tf - Ti)]