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Question 5051
NEET Physics · Medium

Units & Measurements: Mixed Concepts MCQ

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Mixed ConceptsMediumQuestion 5051

Question

The period of oscillation of a simple pendulum T = 2π√(l/g). If l = 20.0 cm (LC = 1 mm) and T = 1.00 s (LC = 0.01 s), the accuracy in determination of g is approximately:
  1. A
    1%
  2. B
    2%
  3. C
    3%
    Correct
  4. D
    4%

Correct answer

3%

Explanation

% error in g = % error in l + 2 × % error in T = (0.1/20.0)×100 + 2×(0.01/1.00)×100 = 0.5% + 2% = 2.5% ≈ 3%.

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