A platinum resistance thermometer has a resista... - WAEC Physics 2003 Question
A platinum resistance thermometer has a resistance 4\(\Omega\) at 0oC and 100\(\Omega\) at 100oC. Assuming the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45oC
A
14.0\(\Omega\)
B
6.7\(\Omega\)
C
3.2\(\Omega\)
D
2.7\(\Omega\)
correct option: b
\(\frac{R - 4}{10 - 4} = \frac{45 - 0}{100 - 0}\)
R = \(\frac{670}{100} = 6.7\Omega\)
R = \(\frac{670}{100} = 6.7\Omega\)
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