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KVPY2015PhysicsWaves and Sound

The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from

Options

  1. A20 to 120 ~dB
  2. B70 to 72 ~dB
  3. C100 to 10000 ~dB
  4. D80 to 100 ~dB

Correct answer

D. 80 to 100 ~dB

Step-by-step solution

Sound intensity =10 ₁₀ ( I I₀ ) I =100 I ₀ so 10 100 i₀ i₀ =20 So level rises by 20 ~dB

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