A platinum resistance thermometer wire has a resistance of 5 ohms at 0 o C
PHYSICS
JAMB 1992
A platinum resistance thermometer wire has a resistance of 5 ohms at 0oC and 5.5 ohms at 100oC. Calculate the temperature of the wire when the resistance is 5.2 ohms
- A. 80oC
- B. 60oC
- C. 40oC
- D. 10oC
Correct Answer: C. 40oC
Explanation
100oC .... 5.5
\(\theta\)oC .... 5.3
0oC .... 5.0
\(\frac{\theta - 0}{100 - 0}\) = \(\frac{5.5 - 5 .0}{5.5 - 5.0}\)
\(\theta\) = 40oC
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