Waves Ques 35
35. The two nearest harmonics of a tube closed at one end and open at other end are $220 Hz$ and $260 Hz$. What is the fundamental frequency of the system?
[2017]
(a) $20 Hz$
(b) $30 Hz$
(c) $40 Hz$
(d) $10 Hz$
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Answer:
Correct Answer: 35.(a)
Solution:
- (a) Difference in two successive frequencies of a closed pipe,
$\frac{2 v}{4 l} \Rightarrow 260-220=40$ Hz
or $\frac{2 v}{4 l}=40\ \text{Hz}$
$\Rightarrow \frac{v}{4 \ell}=20 \text{ Hz}$
What is the fundamental frequency of a system of a closed organ pipe.
BETA
