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Resistance grows with temperature

  1. Dec 27, 2014 #1
    1. The problem statement, all variables and given/known data
    The copper windings in an electric motor have a resistance of 54[Ω] at 200.
    Later the resistance was 60[Ω], what is the temperature

    2. Relevant equations
    $$R_1=R_0(1+\alpha t_1)$$
    α=0.00393[1/0]

    3. The attempt at a solution
    At 00C R0 is: ##54=R_0(1+0.00393\cdot 20)\rightarrow R_0=50.06##
    ##60=50.06(1+0.00393\cdot t_2)\rightarrow t_2=50.5^0##
    It should be t2=2860C
     
  2. jcsd
  3. Dec 27, 2014 #2

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    And your question is what?
     
  4. Dec 27, 2014 #3
    If i am right and the book is wrong.
     
  5. Dec 27, 2014 #4

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    Your math looks good. Books have been known to be in error.
     
  6. Dec 27, 2014 #5
    Thanks and now i saw i read the wrong answer in the book, but thanks anyway for the effort
     
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