6. In the polytropic process pvn = constant, if = ∝ the process will be at
7. The ratio of high temperature to low temperature for reversed Carnot refrigerator is 1.25. The COP will be
8. A composite wall consists of three different materials having thermal conductivity k, 2k and 4k
respectively. The temperature drop across different materials will be in the ratio
9. According to Wien’s law, the wavelength corresponding to maximum energy is proportion to
Absolute temperature (T) as
