Home
Class 12
PHYSICS
A wall has two layers A and B, each made...

A wall has two layers A and B, each made of different material. Both the layers have the same thickness. The thermal conductivity of the material of A is twice that of B . Under thermal equilibrium, the temperature difference across the wall is `36^@C.` The temperature difference across the layer A is

Text Solution

Verified by Experts

Given that `k_(A)=2k_(B)`
In steady state we use
`|(dQ)/(dt)|_(net)=|(dQ)/(dt)|_(A)=|(dq)/(dt)|_(B)`
`implies(k_(A)A(DeltaT_(A)))/(x)=(36)/(1/(k_(A)).(x)/(A)+(1)/(k_(B))(x)/(A)`
`impliesDeltaT_(A)=(36)/(3)=12^(@)C`
Promotional Banner

Topper's Solved these Questions

  • HEAT TRANSFER

    PHYSICS GALAXY - ASHISH ARORA|Exercise Practice Exercise 4.2|8 Videos

  • HEAT TRANSFER

    PHYSICS GALAXY - ASHISH ARORA|Exercise Practice Exercise 4.3|5 Videos

  • HEAT TRANSFER

    PHYSICS GALAXY - ASHISH ARORA|Exercise Illustrative Example 4.29|1 Videos

  • HEAT AND THERMAL EXPANSION

    PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMRICAL PROBLEMS FOR PREPARATION OF NSEP, INPhO & IPhO|82 Videos

  • Kinetic Theory of Gases and Gas Laws

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numerical Problems for Preparation of NSEP, INPhO & IPhO|64 Videos

Similar Questions

Explore conceptually related problems

A wall has two layers A and B, each made of different materials. Both layers are of same thickness. But, the thermal conductivity of material A is twice that of B. If, in the steady state, the temperature difference across the wall is 24^(@)C , then the temperature difference across the layer B is :

A wall has two layers A and B each made of different materials. The layer A is 10cm thick and B is 20 cm thick. The thermal conductivity of A is thrice that of B. Under thermal equilibrium temperature difference across the wall is 35^@C . The difference of temperature across the layer A is

A partition wall has two layers A and B, in contact, each made of a different material. They have the same thickness but the thermal conductivity of layer A is twice that of layer B. If the steady state temperature difference across the wall is 60 K, then the corresponding difference across the layer A is

A partition wall has two layers of different materials A and B in contact with each other. They have the same thickness but the thermal conductivity of layer A is twice that of layer B. At steady state the temperature difference across the layer B is 50 K, then the corresponding difference across the layer A is

A wall has two layers A and B each made of different materials. The thickness of both the layers is the same. The thermal conductivity of A, K_(A) = 3K_(B) . The temperature different across the wall is 20^(@)C in thermal equilibrium

A composite slab consists of two parts of equal thickness. The thermal conductivity of one is twice that of the other. What will be the ratio of temperature difference across the two layers in the state of equilibrium ?

If a body A is in thermal equilibrium with three different bodies B, C and D then