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NEET 2021 Model Test Paper 6
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© examsnet.com
Question : 20
Total: 180
The frequency of vibration of a string is given by:
v
=
P
21
[
F
m
]
1
2
Here p is the number of segments in which the string is divided, F is the tension in the string and l is its length. The dimensional formula for m is:
[
M
0
L
0
T
0
]
[
M
L
−
1
T
0
]
[
M
0
L
0
T
−
1
]
[
M
0
L
T
−
1
]
Validate
Solution:
[
v
]
=
[
T
−
1
]
[
l
]
=
[
L
1
]
[
F
]
=
[
M
1
L
1
T
−
2
]
m
=
ρ
2
F
4
v
2
l
2
[
m
]
=
[
F
]
[
v
2
]
[
l
2
]
=
[
M
1
L
1
T
−
2
]
[
T
−
2
]
[
L
2
]
[
m
]
=
[
M
1
L
−
1
]
© examsnet.com
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