Question

Two tuning forks A and B gives 6 beats per second. A. is in resonance with a closed pipe of length 15 cm. and B Is In resonance with an open pipe of length 30.5 cm. Calculate the frequencies of A and B.

Answer 1

Let f₁ and f₂ be the frequencies of the tuning forks A and B respectively. Then, f₁ – f₂ = 6 ………….(1)

But tuning fork A is in resonance with a closed pipe of length 15 cm

Similarly tuning fork B is in resonance with an open pipe of length 30.5 cm

Frequency of the tuning fork A is

Frequency of the tuning fork B is