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Question 31287
JEE Physics · Hard

Sound Waves: Intensity Advanced MCQ

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Intensity AdvancedHardQuestion 31287

Question

Acoustic intensity at 10 dB is:
  1. A
    10⁻¹¹ W/m²
    Correct
  2. B
    10⁻¹⁰ W/m²
  3. C
    10⁻¹² W/m²
  4. D
    10⁻⁹ W/m²

Correct answer

10⁻¹¹ W/m²

Explanation

β = 10 log(I/I₀). 10 = 10 log(I/10⁻¹²) → log(I/10⁻¹²) = 1 → I = 10×10⁻¹² = 10⁻¹¹ W/m².

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