The two ends of an iron rod are maintained at different temperatures.The amount of heat that flows through the rod by conduction during a given time interval does not depend upon
A)the length of the iron rod.
B)the thermal conductivity of iron.
C)the temperature difference between the ends of the rod.
D)the mass of the iron rod.
E)the duration of the time interval.

Question

Quizplus · Accepted Answer

The amount of heat that flows through the rod by conduction is determined by the thermal conductivity of the material and the temperature difference between the ends of the rod. The length of the rod and the duration of the time interval may affect the rate of heat flow, but not the total amount of heat transferred. The mass of the iron rod does not affect the rate or the total amount of heat transferred since it is not involved in the equation for heat conduction. Therefore, the correct choice is D.

The Two Ends of an Iron Rod Are Maintained at Different