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Question 31358
JEE Physics · Hard

Waves on String: Energy Density MCQ

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

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Energy DensityHardQuestion 31358

Question

Linear energy density (energy per unit length) of a travelling wave on string is:
  1. A
    μω²A²
    Correct
  2. B
    ½μω²A²
  3. C
    μωA²/2
  4. D
    μA²ω²/4

Correct answer

μω²A²

Explanation

Total linear energy density = KE density + PE density = ½μω²A² + ½μω²A² = μω²A² (averaged over one wavelength).

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