A house owner replaces a thick layer of insulation on a flat roof by an thick layer…
PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A house owner replaces a 4cm thick layer of insulation on a flat roof by an 8cm thick layer of the same material while keeping the temperature difference between the two surfaces unchanged. Neglecting edge effects, the rate of heat flow through the roof will
(a) remain unchanged
(b) become one-half of its previous value
(c) become three-fourths of its previous value
(d) become twice its previous value