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MHT CET Medical202625 April 2026Morning ShiftPhysicsThermal Properties of MatterActual

A resistance thermometer has resistance 95 at the ice point and 140 at the steam point. The resistance obtained if the actual temperature is 30^ C is

Options

  1. A117.5
  2. B108.5
  3. C113.5
  4. D13.5

Correct answer

B. 108.5

Step-by-step solution

Using the formula for temperature on the resistance scale: t = R_t - R₀ R₁₀₀ - R₀ 100 Given R₀ = 95 , R₁₀₀ = 140 , and t = 30^ C . Substituting the values: 30 = R_t - 95 140 - 95 100 30 = R_t - 95 45 100 R_t - 95 = 30 45 100 R_t - 95 = 13.5 R_t = 95 + 13.5 = 108.5 Answer: 108.5

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