Two sheets of thickness and are touching each other

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

Problem

Two sheets of thickness

d

and

3d

are touching each other. The temperature just outside the thinner sheet is

T_1

and on the outer side of the thicker sheet is

T_3

. The interface temperature is

T_2

. If

T_1

T_2

, and

T_3

are in arithmetic progression, the ratio of thermal conductivity of the thinner sheet to that of the thicker sheet is (1)

1:3

(2)

3:1

(3)

2:3

(4)

3:9