Thermodynamics ...

Two heat engines A and B have their sources at 1000 K and 1100 K and their sinks are at 500 K and 400 K respectively. What is true about their efficiencies?

Fig. shows three P—V diagrams. In which case work done is minimum ?

Fig shows four thermodynamical process to which a gas sample may be subjected. The isobaric and isothermal curves are

Two isothermals are shown in Fig. at temps T₁ and T₂. Which of the following relations is correct?

The portion AB of indicator diagram, Fig. representing the state of matter represents

Two Carnot engines A and B are operated in series. A receives heat at 800 K and rejects heat at TK. The engine B receives heat at TK and rejects it at 300 K. If their efficiencies are equal, what is T ?

Two plates of same thickness, of coefficients of thermal conductivity K₁ and K₂ and areas of cross section A₁ and A₂ are connected as shown in Fig. The common coefficient of thermal conductivity K will be

Consider two insulating sheets with thermal resistances R₁ and R₂ as shown in Fig. The temperature θ is

Heat current is maximum in which of the following? (rods are of identical dimensions)