12. A Carnot engine absorbs an amount Q of heat from a reservoir at an abosolute temperature T and rejects heat to a sink at a temperature of T/3. The amount of heat rejected is
(a) Q / 4 (b) Q / 3
(c) Q / 2 (d) 2Q / 3
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a