Question

A long metallic bar is carrying heat from one of its ends to the other end under steady - state . the variation of temprature θ along the length x of the bar from its hit end is best described by which of the following figure . [AIEEE 2009]​

Answer 1

Answer:

Option B is the answer.

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Answer 2

Explanation :- We know that

Rate of flow of heat ,

dQ /dt = k A (dθ)dx

In steqdy statev, flow of heat

dθ = dQ/dt × 1/kA dx

⟹ θₕ - θ = k'x

equation θ = θₕ - k'x reapresents a straight line .

Since option (b) is correct .