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Q.

The two ends of a metal rod are maintained at temperatures 100°C  and 110°C. The rate of heat flow in the rod is found to be 4.0J/s. If the ends are maintained at temperatures 200°C and 210°C, the rate of heat flow will be :

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a

44.0 J/s

b

8.0 J/s

c

16.8 J/s

d

4.0 J/s

answer is B.

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Detailed Solution

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Rate of flow of heat, H=KAθ1-θ2x. If temperature difference is kept constant, then rate of flow of heat is also constant.

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