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Question 31214
JEE Physics · Hard

Sound Waves: Wave Parameters MCQ

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Wave ParametersHardQuestion 31214

Question

Pressure wave equation in sound is p = p₀ sin(ωt − kx). Displacement wave lags pressure by:
  1. A
    0
  2. B
    π/2
    Correct
  3. C
    π
  4. D
    π/4

Correct answer

π/2

Explanation

Displacement y = y₀ cos(ωt − kx) = y₀ sin(ωt − kx + π/2). Pressure wave is π/2 ahead of displacement — they are 90° out of phase.

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