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NEET
Exam
NEET
Subject
Physics
Chapter
Waves and Sound

NEET · Physics · Waves and Sound

Assertion: Sound level increases linearly with intensity of sound....

Assertion: Sound level increases linearly with intensity of sound. Reason: If intensity of sound is doubled, sound level increases approximately 3 dB

Options

  1. AIf both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
  2. BIf both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. CIf Assertion is true but Reason is false.
  4. DIf Assertion is false but Reason is true.

Correct answer

D. If Assertion is false but Reason is true.

Step-by-step solution

Sound level LL relates to intensity II as (L=10 \log _{510}\left(I / I_0\right) \Rightarrow) not linear →→ Assetion false. Doubling I: (Δ\DeltaL=10 \log _{10} 2 ≈\approx3  dB→\mathrm{~dB} \rightarrow) Reason true. Result: Assertion false, Reason true.
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