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Waves on String: Wave Speed MCQ

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

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Wave SpeedMediumQuestion 31304

Question

A string of length 2 m, mass 10 g is stretched under tension 100 N. Wave speed is:
  1. A
    100 m/s
  2. B
    141 m/s
    Correct
  3. C
    200 m/s
  4. D
    50 m/s

Correct answer

141 m/s

Explanation

μ = 0.01/2 = 0.005 kg/m. v = √(100/0.005) = √20000 = 141 m/s.

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