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Question 30154
JEE Physics · Medium

Errors and Measurements: Measurements — Conceptual MCQ

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Measurements — ConceptualMediumQuestion 30154

Question

The diameter of a wire is measured 5 times: 1.20, 1.22, 1.20, 1.19, 1.19 mm. Which of the following best represents the result?
  1. A
    1.20 ± 0.01 mm
    Correct
  2. B
    1.20 ± 0.02 mm
  3. C
    1.20 ± 0.10 mm
  4. D
    1.22 ± 0.01 mm

Correct answer

1.20 ± 0.01 mm

Explanation

Mean = (1.20+1.22+1.20+1.19+1.19)/5 = 6.00/5 = 1.200 mm. Mean absolute error ≈ 0.01 mm. Result: 1.20 ± 0.01 mm.

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