Two identical rods of length and cross-sectional area are placed side by side so that…
PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
Two identical rods of length L and cross-sectional area A are placed side by side so that they form parallel thermal paths between two reservoirs at temperatures differing by ΔT. An engineer redesigns the system by reducing each rod’s length to 2L and increasing each rod’s cross-sectional area to 2A, while keeping the material and the temperature difference the same. By what factor does the total rate of energy transfer change compared with the original arrangement?
(a) It increases by a factor of 2.
(b) It decreases by a factor of 2.
(c) It increases by a factor of 4.
(d) It is unchanged.