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

[prishila]

Homework Statement

The resistance of a bobbinin 0 grades celcius is 3.35 ohm. What is its resistance in 50 grades celcius? thermal constant=0.0037

Homework Equations

R1=R0[1+alpha(t-t0)]

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?

 

[berkeman]

Homework Statement

The resistance of a bobbinin 0 grades celcius is 3.35 ohm. What is its resistance in 50 grades celcius? thermal constant=0.0037

Homework Equations

R1=R0[1+alpha(t-t0)]

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 4.0 ohm. Should I find the resistance in 20 grade celcius and then at 50 grades celcius?

Your answer looks correct. If you round your answer to 2 significant figures, what answer do you get?

 

[prishila]

Your answer looks correct. If you round your answer to 2 significant figures, what answer do you get?

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

 

[berkeman]

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

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