A) 2 m
B) 1 m
C) 1.5 m
D) 2.5 m
Correct Answer: B
Solution :
Successive frequency are in the ratio 425:595:765 i.e., 5:7:9. This indicates that only odd harmonics are present. Hence it is a closed organ pipe. In a closed Organ pipe the frequency of the 5th harmonic is 5v/4 fi where v is the velocity of sound. So,\[\frac{5v}{4\ell }=425\]where \[v=340\,m/s.\] \[\therefore \]\[\ell =1\,m.\] Hence, the correction option is (b).You need to login to perform this action.
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