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Question 31217
JEE Physics · Hard

Sound Waves: Decibel MCQ

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

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DecibelHardQuestion 31217

Question

If intensity increases by a factor of 1000, sound level increases by:
  1. A
    30 dB
    Correct
  2. B
    10 dB
  3. C
    3 dB
  4. D
    1000 dB

Correct answer

30 dB

Explanation

Δβ = 10 log(1000) = 10×3 = 30 dB.

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