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According to Clausis statement of second law of thermodynamics | |
A. | heat can't be transferred from low temperature source to high tempera¬ture source [Wrong Answer] |
B. | heat can be transferred for low temperature to high temperature source by using refrigeration cycle. [Wrong Answer] |
C. | heat can be transferred from low temperature to high temperature source if COP of process is more than unity [Wrong Answer] |
D. | heat can't be transferred from low temperature to high temperature source without the aid of external energy [Correct Answer] |
E. | all of the above. [Wrong Answer] |