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NEET2006PhysicsWaves and SoundActual

Two sound waves with wavelengths 5.0 m and 5.5 ~m respectively, each propagate in a gas with velocity 330 ~m / s . We expect the following number of beats per second:

Options

  1. A6
  2. B12
  3. C0
  4. D1

Correct answer

A. 6

Step-by-step solution

gathered Frequency = Velocity Wave length V₁= V ₁ = 330 5 =66 H ₂ gathered and V₂= V ₂ = 330 5 5 =60 H ₂ Number of beats per second =V₁-V₂=60-60=6 .

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