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JEE Main 20 July 2021 Shift 2 Solved Paper
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© examsnet.com
Question : 5
Total: 90
The length of a metal wire is
l
1
, when the tension in it is
T
1
and is
l
2
when the tension is
T
2
. The natural length of the wire is :
[20 Jul 2021 Shift 2]
√
l
1
l
2
l
1
T
2
−
l
2
T
1
T
2
−
T
1
l
1
T
2
+
l
2
T
1
T
2
+
T
1
l
1
+
l
2
2
Validate
Solution:
T
1
=
k
(
l
1
−
l
0
)
T
2
=
k
(
l
2
−
l
0
)
T
1
T
2
=
l
1
−
l
0
l
2
−
l
0
T
1
l
2
−
T
2
l
1
T
1
−
T
2
=
l
0
© examsnet.com
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