If η1 and η2 are the thermal efficiencies of two individual power – McqOptions

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1.	If η1 and η2 are the thermal efficiencies of two individual power plants. When they are coupled series, the overall thermal efficiency η0 of the combined plant is given by
A.	η0 = η1 η2
B.	η0 = η1 + η2
C.	η0 = η1 + η2 – η1 η2
D.	\({\eta _0} = \frac{{{\eta _1} \;+\; {\eta _2}}}{{{\eta _1}{\eta _2}}}\)
Answer» D. \({\eta _0} = \frac{{{\eta _1} \;+\; {\eta _2}}}{{{\eta _1}{\eta _2}}}\)

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