NEET 2019 Model Question Paper 2

Two Carnot engines A and B are operated in series. The first one, A, receives heat at T1 = (600K) and rejects to a reservoir at temperature T2. The second engine B receives heat rejected by the first engine and, in turn, rejects to a heat reservoir atT3 = (400K). Calculate the temperature T2 if the work outputs of the two engines are equal