The fimdamental frequency of a closed organ pipe is equal to second of an open organ pipe is the length of closed organ pipe is 15 cm. The length of open organ pipe isA. 90 cmB. 30 cmC. 15 cmD. 20 cm

The fimdamental frequency of a closed organ pipe is equal to second of

1.	The fimdamental frequency of a closed organ pipe is equal to second of an open organ pipe is the length of closed organ pipe is 15 cm. The length of open organ pipe isA. 90 cmB. 30 cmC. 15 cmD. 20 cm
Answer» Correct Answer - A For closed organ pipe `f_(1)=v/(4l_(1))" "["for fundamental"]` For open organ pipe, `f_(2)=(3v)/(2l_(2))" "["second overlone"]` `f_(1)=f_(2)thereforev/(4l_(1))=(3v)/(2l_(2))rArr(l_(2))/(l_(1))=6` `therefore" "l_(2)=6l_(1)=6xx15=90cm`

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The fimdamental frequency of a closed organ pipe is equal to second of an open organ pipe is the length of closed organ pipe is 15 cm. The length of open organ pipe isA. 90 cmB. 30 cmC. 15 cmD. 20 cm

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