JEE Main 2018 Physics question
Two Carnot engines A and B are operated in series. Engine A receives heat from a reservoir at 600 K and rejects heat to a reservoir at temperature T. Engine B receives heat rejected by engine A and in turn rejects it to a reservoir at 100 K. If the efficiencies of the two engines A and B are represented by and respectively, then what is the value of
Answer: (D)
Solution
Insufficient data as printed: the ratio depends on T. The key assumes the engines do equal work (as in the original JEE
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