Two tuning forks A and B sounded together and 8 beats/sec. are observed. A is in resonance with column of air 32cm long in a pipe closed at one end and B is similarly in resonance with air column when

Question

Two tuning forks A and B sounded together and 8 beats/sec. are observed. A is in resonance with column of air 32cm long in a pipe closed at one end and B is similarly in resonance with air column when length of column is increased by 1 cm. If frequency of B is ( 4 ) x Hz , then value of x is :-

TestHub · Accepted Answer

Closed pipe: f A ​ = v / ( 4 × 0.32 ) , f B ​ = v / ( 4 × 0.33 ) . f A ​ − f B ​ = 8 ⇒ v = 8 × 4 × ( 0.32 × 0.33 ) /0.01 ≈ 338 m / s . f B ​ = 338/ ( 4 × 0.33 ) ≈ 256 Hz = 4 4 Hz , so x = 4 .

Physics - Sound Wave Question with Solution | TestHub

Doubts & Discussion