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

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1. Jan 21, 2016

prishila

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. Jan 21, 2016

Staff: Mentor

3. Jan 21, 2016

prishila

Sorry I corrected it, the answer in my book is 4.06 ohm

4. Jan 21, 2016

Staff: Mentor

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