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Velocity of sound in open ended tube is 330 \mathrm{~m} / \mathrm{s}, the frequency of tuning fork is 1.1 \mathrm{kHz} and the length of tube is 30 \mathrm{~cm}. In which harmonic will it oscillate?
 

Option: 1

\mathrm{2nd}


Option: 2

\mathrm{3rd}


Option: 3

\mathrm{4th}


Option: 4

\mathrm{5th}


Answers (1)

let this be in \mathrm{n^{th}} harmonic, then

\mathrm{ \eta \left(\frac{k}{2 l}\right)=1.1 \times 10^3 . }

\mathrm{ \eta =\frac{2.2 \times 10^3}{n} \times 1 }

\mathrm{ \eta =\frac{2.2 \times 10^3 \times 0.3}{330} }

\mathrm{ \eta =2 }

Hence option 1 is correct.





 

Posted by

Kshitij

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