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Find the resistance at 50 degrees C given resistance at 0 C

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  1. Jan 21, 2016 #1
    1. The problem statement, all variables and given/known data
    The resistance of a bobbinin 0 grades celcius is 3.35 ohm. What is its resistance in 50 grades celcius? thermal constant=0.0037

    2. Relevant equations
    R1=R0[1+alpha(t-t0)]

    3. The attempt at a solution
    Using this formula
    R1=3.35[1+0.0037(50-0)]=3.35*1.185=3.96975, but the answer in my book is 4.06 ohm. Should I find the resistance in 20 grade celcius and then at 50 grades celcius?
     
    Last edited: Jan 21, 2016
  2. jcsd
  3. Jan 21, 2016 #2

    berkeman

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    Staff: Mentor

    Your answer looks correct. If you round your answer to 2 significant figures, what answer do you get?
     
  4. Jan 21, 2016 #3
    Sorry I corrected it, the answer in my book is 4.06 ohm
     
  5. Jan 21, 2016 #4

    berkeman

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    Staff: Mentor

    Weird. I get the same answer as you do...
     
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