JEE Advanced Model Paper 4 with solutions for online practice

Question : 14 of 54

Marks: +1, -0

Two plates of thickness l1 and l2 with thermal conductivities K1 and K2 respectively are kept in thermal contact as shown in the figure

If' A' is area of each face and beat is flowing through the combination in steadystate along the direction as shown in the figure. Then mark the correct options.

thermal resistance of combination is R =
l1
AK1
+
l2
AK2
Heat flow rate through the combination is H =
A(T1−T2)
(
l1
K1
+
l2
K2
)
Temperature of joint of slabs is T =
T1
l2
K2
+
l1
K1
T2
(
l1
K1
+
l2
K2
)
Equivalent thermal conductivity of combination will be keq =
l1+l2
(
l1
K1
+
l2
K2
)

Validate

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