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KCET2008PhysicsWaves 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

L =10 ₁₀ I I ₀ 60=10 ₁₀ I ₁ I ₀ I ₁ I ₀ =10⁶ Similarly, aligned &30=10 ₁₀ I ₂ I ₀ & I ₂ I ₀ =10³ aligned Dividing Eq. (i) by Eq. (ii), we get I ₁ I ₂ =1000

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