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NEETPhysicsWaves and 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 (L ) relates to intensity (I ) as (L=10 ₅₁₀ (I / I₀ ) ) not linear ( ) Assetion false. Doubling I: ( L=10 ₁₀ 2 3 ~dB ) Reason true. Result: Assertion false, Reason true.

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