- #1
ilyas415
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Homework Statement
A Pt-resistance thermometer is used to measure temperatures in the range 0°C to 100°C. The electrical resistance of the thermometer is 2 Ω at 20°C and 6 Ω at 100°C. It is necessary to measure the temperature to an accuracy of ± 0.1 K. How accurately must the electrical resistance be measured?
Homework Equations
I don't think you need any equations.
The Attempt at a Solution
I tried assuming a linear relationship because the liquid in the thermometer must have a linear expansion. I figured out the linear relationship:
T = 20R - 20 [where T is the temperature in celsius and R is the resistance in ohms].
However, after this, I'm not sure how to approach the question. I don't quite fully understand what the question is asking. Any help will be appreciated. Thanks in advance.