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JEE Main 24 June 2022 Shift 1 Solved Paper
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© examsnet.com
Question : 50
Total: 90
Two metallic blocks
M
1
and
M
2
of same area of cross-section are connected to each other (as shown in figure). If the thermal conductivity of
M
2
is
K
then the thermal conductivity of
M
1
will be :
[Assume steady state heat conduction]
[24-Jun-2022-Shift-1]
10
K
8
K
12.5
K
2
K
Validate
Solution:
Thermal current is same so
d
Q
d
t
=
∆
T
1
I
1
K
1
A
=
∆
T
2
I
2
K
2
A
or
20
16
×
K
′
=
80
8
×
K
⇒
K
′
=
8
K
© examsnet.com
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