Wave Motion 2 Question 25
25. A tube, closed at one end and containing air, produces, when excited, the fundamental note of frequency $512 Hz$. If the tube is opened at both ends the fundamental frequency that can be excited is (in $Hz$ )
(1986, 2M)
(a) 1024
(b) 512
(c) 256
(d) 128
Show Answer
Answer:
Correct Answer: 25. (a)
Solution:
- $f _c=\frac{v}{4 l}=512 Hz$
$$ f _o=\frac{v}{2 l}=2 f _c=1024 Hz $$
