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JEEMAIN and NEET
>>
Physics
>>
Class11
>>
Thermodynamics
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Q)
An iron bar is heated from
0
0
C
to
50
0
C
. If
γ
of iron =
2
×
10
12
d
y
n
e
/
c
m
2
and
α
of iron is
12
×
10
−
6
/
0
C
. The stress developed in the rod if it is prevented from expanding is
(
a
)
12
×
10
5
N
/
m
2
(
b
)
12
×
10
6
N
/
m
2
(
c
)
12
×
10
7
N
/
m
2
(
d
)
12
×
10
8
N
/
m
2
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