1.

Efficiency of Carnot engine is 100% if                 [Pb. PET 2000]

A.            \[{{T}_{2}}=273\,\,K\]      
B.            \[{{T}_{2}}=0\,\,K\]
C.            \[{{T}_{1}}=273\,\,K\]      
D.            \[{{T}_{1}}=0\,\,K\]
Answer» C.            \[{{T}_{1}}=273\,\,K\]      


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