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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
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