Question

A slab consists of two parallel layers of copper and brass of
the same thickness and having thermal conductivities in
the ratio 1 : 4. If the free face of brass is at 100°C and that of
copper at 0°C, the temperature of interface is
(a) 80°C (b) 20°C
(c) 60°C (d) 40°C

Answer 1

Answer:

ANSWER

As we know that conductive heat flow is given as Q=

L

KAΔT

and it is given that relation between thermal conductivity are as follow,

K

brass

=4K

copper

so,let an intermediate temperature T will line at inside the slab.

therefore,we equate the rate of heat flow from copper surface and brass surface,as follow

K

brass

(100−T)=K

copper

(T−0)

4(100−T)=T−0

T=80

0C

Answer 2

Answer:

1 answer

If the free face of brass is at 100∘C and that of copper at 0∘C , the ... and brass of the same thickness and having thermal conductivities in the ratio 1:4. If ...

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