Units & Measurements: Mixed Concepts MCQ

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

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Mixed ConceptsMediumQuestion 5051

Question

For g = 4π²l/T², take l = (20.0 ± 0.1) cm and T = (1.00 ± 0.01) s, with maximum error bounds. What is the first-order maximum percentage error in g?

A
0.5%
B
1.5%
C
2.5%
Correct
D
4.0%

Correct answer

2.5%

Explanation

Length contributes (0.1/20.0) × 100 = 0.5%; the squared period contributes 2 × (0.01/1.00) × 100 = 2%. The first-order maximum total is 2.5%. This bound is not an accuracy guarantee.

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