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Question 30140
JEE Physics · Hard

Errors and Measurements: Error Interpretation MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Error InterpretationHardQuestion 30140

Question

A result is reported as (25.4 ± 0.2) cm. This means:
  1. A
    The true value is exactly 25.4 cm
  2. B
    The true value lies between 25.2 and 25.6 cm
    Correct
  3. C
    The error is 2 cm
  4. D
    The result has 2 significant figures

Correct answer

The true value lies between 25.2 and 25.6 cm

Explanation

The ± notation gives the confidence interval: the true value is most likely in [25.4−0.2, 25.4+0.2] = [25.2, 25.6] cm.

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