AP EAMCET2001PhysicsWaves and Sound
The sound waves of wavelengths 5 ~m and 6 ~m formed 30 beats in 3 ~s . The velocity of sound is
Options
- A300 ~ms ⁻¹
- B310 ~ms ⁻¹
- C320 ~ms ⁻¹
- D330 ~ms ⁻¹
Correct answer
A. 300 ~ms ⁻¹
Step-by-step solution
₁=5 ~m , ₂=6 ~m Frequency of first, n₁= v ₁ Similarly, n₂= v ₂ Number of beats per sec (n₁-n₂ )= 30 3 aligned v ₁ - v ₂ & =10 v ( 1 ₁ - 1 ₂ )=10 v ( 1 5 - 1 6 ) & =10 v ( 1 30 )=10 v & =300 ~m / s aligned