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  • A tube closed at one end containing air produces, when excited, the fundamental note of frequency <img alt="\mathrm{ 512 \mathrm{kHz}}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathr

A tube closed at one end containing air produces, when excited, the fundamental note of frequency \mathrm{ 512 \mathrm{kHz}}. If the tube is opened at both ends, the fundamental frequency \mathrm{ ( in H _z)}, that can be excited is -
 

Option: 1

1024


Option: 2

512


Option: 3

256


Option: 4

128


Answers (1)

best_answer

fundamental frequency of closed pipe is \mathrm{\frac{v}{4 l}} and that of open pipe is \mathrm{\frac{V}{2 l}}, two times that of closed pipe.

i.e the fundamental frequency of open pipe at both ends is -

\mathrm{ f=512 \times 2=1024 \mathrm{~Hz} . }

Hence option 1 is correct.
 

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