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28. The efficiency of Carnot engine when source temperature is

T1 and sink temperature is T2 will be

(a) (T1 –  T2)/ T1                                        (b) (T2 –T1 )/T2

(c) (T1 –  T2)/ T2                                         (d) T1 /T2

Answer-a

(11)

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