20. A scientist says that the efficiency of his heat engine which operates at source temperature 127°C and sink temperature 27°C is 26%, then
(a) It is impossible
(b) It is possible but less probable
(c) It is quite probable
(d) Data are incomplete
Answer-a
(7)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (118)
(a) 34 J (b) 70 J (c) 84 J (d) 134 J Answer-d (202)