Question

A wall has two layers and , each made of different materials. Both the layers have the same thickness. The thermal conductivity of the material of is twice that of . Under thermal equilibrium, the temperature difference across the wall is . The temperature difference across the layer is

A

B

C

D

Medium

Solution

verified
Verified by Toppr
Correct option is B)

Consider two walls '' and '' of thickness '' each, and thermal conductivity of '' and '' respectively.
The temperatures at the left of =
The temperatures at the right of =
The temperature at the junction =
Heat flow is a constant in steady state:

Equating heat flow for both walls we get:

Which simplifies to:
Also given that the temperature difference between the walls is

Combining the two equation in and eliminating
We get

Solve any question of Thermal Properties Of Matter with:-

Was this answer helpful?

upvote 0
downvote0

Similar questionsstar-struck

Two slabs A and B of different materials but of the same thickness are joined end to end to form a composite slab. The thermal conductivities of A and B are and respectively. A steady temperature difference of  is maintained across the composite slab. If , the temperature difference across slab A is:

View solution
>

A wall has two layers and , each made of different material. Both the layers have the same thickness. The thermal conductivity of material of is twice that of . Under thermal equilibrium,the temperature difference across the wall is C . The temperature difference across the layer is :

View solution
>

A wall has two layers and , each of same thickness and same area of cross-section but made of different materials. The thermal conductivity of is three times that of . The temperature difference across the wall is C . In thermal equilibrium :

a) the temperature difference across the layer is 15C
b) the temperature difference across the layer is 15C
c) the rate of flow of heat across is more than across
d) the rate of flow of heat across and are same

View solution
>

A partition Wall has two layers and , in contact, each made of a different material. They have the same thickness but the thermal conductivity of layer is twice that of layer . If the steady state temperature difference across the wall is , then the corresponding difference across the layer is

View solution
>

of heat is conducted through a wall of thickness in . Temperature difference between the two sides of the wall is . The thermal conductivity of the material of the wall is (in ) :

View solution
>

View more