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Class 11 NEET Physics Waves Questions Questions
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© examsnet.com
Question : 23
Total: 91
The number of possible natural oscillations of air column in a pipe closed at one end of length 85 em whose frequencies lies below
1250
Hz are: (velocity of sound
=
340
m
s
−
1
)
[NEET 2014]
4
5
7
6
Validate
Solution:
👈: Video Solution
I
c
=
0.85
m
f
0
=
v
4
l
c
=
340
m
s
−
1
4
×
0.85
m
=
100
Hz
f
n
=
(
2
n
+
1
)
f
0
=
f
0
,
3
f
0
,
5
f
0
,
7
f
0
,
9
f
0
,
11
f
0
,
13
f
0
=
100
H
z
,
300
H
z
,
500
H
z
,
700
H
z
,
900
H
z
,
1100
H
z
© examsnet.com
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