27. For which combination of working temperatures the efficiency of Carnot’s engine is highest
(a) 80 K, 60 K (b) 100 K, 80 K
(c) 60 K, 40 K (d) 40 K, 20 K
Answer-d
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a