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the outer faces of rectangular slab made up of equal thickness of iron and brass are maintained at 100 degree and 0 degree celcius given the thermal conductivities of iron and brass are 0.2 and 0.3 respectively. how to find the temperature at the interface?

the outer faces of rectangular slab made up of equal thickness of iron and brass are maintained at 100 degree and 0 degree celcius given the thermal conductivities of iron and brass are 0.2 and 0.3 respectively. how to find the temperature at the interface?
 

Grade:11

1 Answers

GURIYA GUPTA
15 Points
5 years ago
Rate of flow of heat energy through iron=rate of flow of heat energy through brass
KA(dT)/l= KA(dT)/l
As Area and length are same, therfore,
0.2(100-T)=0.3(T-0)
20-0.2T=0.3T
T=20/0.5
T=40°C

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