Question

Choose the incorrect statement from the following:
S1: The efficiency of a heat engine can be 1, but the coefficient of performance of a refrigerator can never be infinity
S2: The first law of thermodynamics is basically the principle of conservation of energy
S3: The second law of thermodynamics does not allow several phenomena consistent with the first law
S4: A process, whose sole result is the transfer of heat from a colder object to hotter object is impossible
A. S1
B. S3
C. S2
D. S4

Answer 1

Correct Answer - A
Efficiency , `eta=1-(T_(2))/(T_(1))=1-(T_(2))/oo" " (T_(1)=oo)`
`n_(2)=1`
As source at infinite temperature or sink at OK is notattainable .Therefore ,efficiency of heat engine of heat engine is always less than 1 .