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Question 31209
JEE Physics · Medium

Sound Waves: Intensity MCQ

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IntensityMediumQuestion 31209

Question

Threshold of pain (120 dB) is how many times louder than threshold of hearing (0 dB)?
  1. A
    120 times
  2. B
    1000 times
  3. C
    10¹² times
    Correct
  4. D
    10⁶ times

Correct answer

10¹² times

Explanation

β = 10 log(I/I₀). At 120 dB: 120 = 10 log(I/I₀) → I/I₀ = 10¹². Intensity is 10¹² times higher.

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