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Question

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


A

4.0 J/s

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B

44.0 J/s

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C

16.8 J/s

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D

8.0 J/s

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Solution

The correct option is A

4.0 J/s


Rate of heat flow = k.A.ΔTx

Since Δ T is same i.e. 10 C, the rate of flow will be same i.e. 4.0 J/s.


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