A) remains unchanged
B) will be doubled
C) will be halved
D) become four times
Correct Answer: A
Solution :
The coefficient of thermal conductivity of a material is defined as the amount of heat flowing in \[{{1}_{s}}\] through a rod of the material of 1m length and \[1{{m}^{2}}\]area of cross-section in the steady state, if the difference of temperature between the two ends of the rod is \[{{1}^{o}}C\]and the flow of heat is normal to the end faces of the rod. Coefficient of thermal conductivity K is a constant, whose value depends upon the material of the rod. Therefore even if temperature increase or decreases, its thermal conductivity remains unchanged.
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