MHT CET202123 Sep 2021Morning ShiftPhysicsThermal Properties of MatterActual
The temperature difference between two sides of an iron plate, 1.8 ~cm thick is 9^ C . Heat is transmitted through the plate 10 k cal / s . m ^2 at steady state. The thermal conductivity of iron is
Options
- A0.02 kcal ms ^ C
- B0.04 kcal ms ^ C
- C0.05 kcal ms ^ C
- D0.004 kcal ms ^ C
Correct answer
A. 0.02 kcal ms ^ C
Step-by-step solution
aligned & Q At = k d & 10= k 9 1.8 10^2 & k = 18 10⁻² 9 =2 10⁻² kcal / ms ^ C aligned