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JAMB Physics 1992 Question 13

Question 13

Temperature and Thermometers

A platinum resistance thermometer wire has a resistance of 5 ohms at 0°C and 5.5 ohms at 100°C. Calculate the temperature of the wire when the resistance is 5.2 ohms.

  1. A.80°C
  2. B.60°C
  3. C.40°C
  4. D.10°C
Show the answer and explanation

Answer: C (40°C)

Explanation

θ = (5.2 − 5.0)/(5.5 − 5.0) × 100 = 0.2/0.5 × 100 = 40°C.