2. The coefficient of performance of a Carnot refrigerator working between 30°C and 0°C is
(a) 10 (b) 1
(c) 9 (d) 0
Answer-c
(4)
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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)