Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Resistance question

  1. Mar 8, 2005 #1

    A toaster with a Nichrome heating element has a resistance of 80.0ohms at 20.0 degrees Celsius. At the instant it is turned on, the current is 1.50 A. When the heating element reaches its final temperature, the current is 1.30 A. What is the final temperature of the heating element?

    Now the "rho" and "alpha" values I've found for Nichrome are:

    "rho" 100*10^-8
    "alpha" 0.0004

    My answer does not make sence, since I've found -313C... do I have to take the absolute value of the temperature I find, or did I mess something up?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted