A wall has two layers and

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A wall has two layers

A

and

B

, each made of different materials. Both layers have the same thickness. The thermal conductivity of material

A

is twice that of

B

. Under thermal equilibrium, the temperature difference across layer

B

36^\circ\text{C}

. The temperature difference across layer

A

is (1)

6^\circ\text{C}

(2)

12^\circ\text{C}

(3)

18^\circ\text{C}

(4)

24^\circ\text{C}