An open pipe is in resonance in 2nd harmonic with frequency f 1 . Now one end of the tube is closed and frequency is increased to f 2 such that the resonance again occurs in nth harmonic. Choose the correct option:
f 1
f 1
f 1
f 1
Text Solution
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Fundamental harmonic of open organ pipe is given by:
as tube vibrates in second harmonic, hence 
if one end is close, it gives only odd harmonics & Fundamental frequency
other harmonics are ( 
), ( 
) etc.
One frequency starts increasing the first higher harmonic that is resonated is ( 
)
if 
, then 
However here is a snag. The frequency is increased from ( 
) hence ( 
).
is not greater than 
.
is the answer
Answer is 
and 
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