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Question
Consider one-dimensional steady state heat conduction, without heat generation, in a plane wall; with boundary conditions as shown in the figure below. The conductivity of the wall is given by k=k0+bT; where k0 and b are positive constants, and T is temperature.
As x increases, the temperature gradient (dT/dx) will
Consider one-dimensional steady state heat conduction, without heat generation, in a plane wall; with boundary conditions as shown in the figure below. The conductivity of the wall is given by k=k0+bT; where k0 and b are positive constants, and T is temperature.
As x increases, the temperature gradient (dT/dx) will
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Solution
The correct option is D Decrease
Q=−kAdTdx .....(1)
where k=k0+bT;
As x increases, T increases, then k also increases.
i.e.,kis +ve
Equation (1), indicates dTdx decreases.
Q=−kAdTdx .....(1)
where k=k0+bT;
As x increases, T increases, then k also increases.
i.e.,kis +ve
Equation (1), indicates dTdx decreases.
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