In an open pipe when air column is 20cm it is in resonance with tuning fork A. When length is increased by 2cmthen the air column is tn resonance with fork B. When A and B are sounded together 4 beats/sec are heard. Frequencies of A and B are respectively (in Hz)

In an open pipe when air column is 20cm it is in resonance with tuning

1.	In an open pipe when air column is 20cm it is in resonance with tuning fork A. When length is increased by 2cmthen the air column is tn resonance with fork B. When A and B are sounded together 4 beats/sec are heard. Frequencies of A and B are respectively (in Hz)
Answer» <html><body><p>`40,44`<br/>`88,80`<br/>`80,88`<br/>`44,40`</p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :`(n_(<a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>))/(n_(2))=(l_(2))/(l_(1))=(22)/(20) ( :.l_(2)=20+2=22cm)impliesn_(1)-n_(2)=Deltan`</body></html>