A) remains unchanged
B) is doubled
C) is halved
D) becomes four times
Correct Answer: A
Solution :
The coefficient of thermal conductivity of a material is the amount of heat flowing in 1 s through a rod of that material of 1 m length and 1 \[{{m}^{2}}\] area of cross-section in the steady state; when the difference of temperatures between the two ends of the rod is \[1{}^\circ C\] 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. Hence, even if temperature increases or decreases, its thermal conductivity remains unchanged.
You need to login to perform this action.
You will be redirected in
3 sec
