Q. A wall 50 mm thick (thermal conductivity k = 40 W/m?C) has temperature difference on two surfaces of 100?C. What could probably change if the temperature difference of this wall drops to 100?C (Solved)
1. Thickness of wall reduces to 5 mm
2. Thickness of wall increases to 500 mm
3. Thermal conductivity changes to 400 W/?C
4. Rate of heat flow drops to one tenth of the original
5. Area of heat transfer increases 10 times
- d. Rate of heat flow drops to one tenth of the original