WAEC Physics 2025 Objective — Question 43
Question 43 of 51 from the West African Examinations Council (WAEC) Physics 2025 Objective paper, with the correct answer and a full explanation.
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The ice and steam points of a resistance thermometer are 12.0Ω and 20.0Ω respectively. Calculate the resistance of the thermometer at 10°C.
- A. 12.4Ω
- B. 12.8ΩCorrect
- C. 13.2Ω
- D. 13.4Ω
Explanation
By linear interpolation: R = 12 + (10/100)×(20-12) = 12 + 0.8 = 12.8Ω.
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