A platinum resistance thermometer has a resistance 4(Omega) at 0oC and 100(Omega) at 100oC. Assuming…

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 Answer: Option B
Explanation

(frac{R – 4}{10 – 4} = frac{45 – 0}{100 – 0})
R = (frac{670}{100} = 6.7Omega)

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