STANDARD Physics Error Analysis MCQ Question
The temperatures of two bodies measured by a thermometer are t₁ = 20°C ± 0.5°C and t₂ = 50°C ± 0.5°C. The temperature difference and the error in the result is
30°C ± 1°C
70°C ± 0.5°C
30°C ± 0.5°C
70°C ± 1°C
Correct Answer
Detailed Explanation
The temperature difference of two bodies is t = t₂ - t₁ = 50°C - 20°C = 30°C. The error in temperature difference is given by t = (Δt₁ + Δt₂) = (0.5°C + 0.5°C) = 1°C. Therefore, the temperature difference is 30°C ± 1°C.
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