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Byju's Answer
Standard XII
Physics
Thermal Expansion
How much will...
Question
How much will a bar of aluminium
100
c
m
long, expand when heated from
20
o
C
to
100
o
C
? Coefficient of linear expansion of aluminium is
2.5
×
10
−
5
C
−
1
.
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Solution
Expansion of rod
=
c
o
e
f
f
i
c
i
e
n
t
o
f
e
x
p
a
n
s
i
o
n
×
L
×
Δ
T
=
2.5
×
10
−
5
×
1
×
(
100
−
20
)
=
0.002
m
=
0.2
c
m
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0
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