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Question 31379
JEE Physics · Hard

Waves on String: Wave Speed Variation MCQ

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

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Wave Speed VariationHardQuestion 31379

Question

A heavy uniform chain hangs vertically from a fixed point. Speed of transverse wave at a point distance x from free end is:
  1. A
    √(gx)
    Correct
  2. B
    √(2gx)
  3. C
    gx
  4. D
    √(gL)

Correct answer

√(gx)

Explanation

Tension at height x from bottom = μgx (weight of chain below). v = √(T/μ) = √(μgx/μ) = √(gx).

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