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Question 31329
JEE Physics · Medium

Waves on String: Sonometer MCQ

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

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SonometerMediumQuestion 31329

Question

Laws of vibration of a string: which one is correct?
  1. A
    f ∝ L (law of length)
  2. B
    f ∝ √μ (law of mass)
  3. C
    f ∝ 1/√μ (law of mass)
    Correct
  4. D
    f ∝ 1/T

Correct answer

f ∝ 1/√μ (law of mass)

Explanation

f = (1/2L)√(T/μ) ∝ 1/√μ. Heavier string (more mass per length) vibrates at lower frequency.

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