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COMEDK2018PhysicsWaves and Sound

How many times more intense is a 60 ~dB sound than a 30 ~dB sound?

Options

  1. A1000
  2. B2
  3. C100
  4. D4

Correct answer

A. 1000

Step-by-step solution

Loudness of sound is given as L=10 ₁₀ I I₀ So, we get L₂-L₁=10 ₁₀ I₂ I₁ here L₁=30 ~dB , L₂=60 ~dB array ll & 60-30=10 ₁₀ I₂ I₁ & 3= ₁₀ I₂ I₁ & I₂ I₁ =10³ I₂=1000 I₁ array

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