Resistance grows with temperature

1. Dec 27, 2014

Karol

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. Dec 27, 2014

Bystander

3. Dec 27, 2014

Karol

If i am right and the book is wrong.

4. Dec 27, 2014

Bystander

Your math looks good. Books have been known to be in error.

5. Dec 27, 2014

Karol

Thanks and now i saw i read the wrong answer in the book, but thanks anyway for the effort