One end of a copper rod of length and cross-sectional area is maintained at while the…
PHYSICS · Multi-part · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
One end of a copper rod of length 0.50m and cross-sectional area 1.0cm2 is maintained at 150∘C while the other end is kept at 50∘C. The thermal conductivity of copper is 385Wm−1K−1. Neglect any heat loss from the curved surface of the rod.
(i) Calculate the rate at which heat is conducted through the rod.
(ii) Suppose the rod is placed inside an evacuated glass tube while the end temperatures are kept unchanged. Will the rate of heat transfer between the two ends of the rod change? Give a reason based on the dominant mode of heat transfer in this situation.