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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?
 

Urvashi Kaul , 8 Years ago
Grade 11
anser 1 Answers
GURIYA GUPTA

Last Activity: 6 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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