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Byju's Answer
Standard XII
Physics
Velocity in 2D
A sonometer w...
Question
A sonometer wire has a length of
114
cms between two fixed ends; Where should two bridges be placed so as to divide the wire into three segments whose fundamental frequencies are in the ratio
1
:
3
:
4
?
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Solution
l
1
+
l
2
+
l
3
=
114
n
1
=
1
2
l
1
√
T
/
m
;
n
2
=
1
2
l
2
√
T
/
m
;
n
3
=
1
2
l
3
√
T
/
m
n
1
:
n
2
:
n
3
=
1
:
3
:
4
n
2
n
1
=
l
1
l
2
=
3
; or
l
2
=
l
1
/
3
Similarly,
l
2
=
l
1
/
4
⇒
l
1
+
l
1
/
3
+
l
1
/
4
=
114
or
l
1
=
72
cm;
l
2
=
24
cm;
l
3
=
18
cm.
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A sonometer wire of length 114 cm is fixed at the both the ends. Where should the two bridges be placed so as to divide the wire into three segments whose fundamental frequencies are in the ratio 1:3:4?
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