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AIPMT 2014 Physics and Chemistry Paper
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© examsnet.com
Question : 21
Total: 90
The number of possible natural oscillation of air column in a pipe closed at one end length 85
cm
whose frequencies lie below
1250
Hz
are : (velocity of sound
=
340
ms
−
1
)
4
5
7
6
Validate
Solution:
Frequency COP,
f
n
=
(
2
n
+
1
)
v
∕
4
R
for
n
=
0
,
f
0
=
100
Hz
n
=
1
,
f
1
=
300
Hz
n
=
2
,
f
2
=
500
Hz
n
=
3
,
f
3
=
700
Hz
n
=
4
,
f
4
=
900
Hz
n
=
5
,
f
5
=
1100
Hz
Which are less than
1250
Hz
.
© examsnet.com
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