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Class 11 NEET Physics Properties of Matter Questions
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© examsnet.com
Question : 2
Total: 89
The maximum elongation of a steel wire of
1
m
length if the elastic limit of steel and its Young's modulus, respectively, are
8
×
10
8
N
m
−
2
and
2
×
10
11
N
m
−
2
, is:
[NEET 2024]
4
mm
0.4
mm
40
mm
8
mm
Validate
Solution:
👈: Video Solution
In the case for maximum elongation,
Stress
=
Elastic limit
δ
max
=
σ
elastic
×
L
Young's modulus
=
8
×
10
8
×
1
2
×
10
11
=
4
×
10
−
3
=
4
mm
i.e. maximum elongation is
4
mm
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