railway RRB JE (CBT I + CBT II) Mock Test 2024 Thermodynamics Second Law of Thermodynamics and Entropy
In order that a cycle be reversible, following must be satisfied
1
free expansion or friction resisted expansion/compression process should not be encountered
2
when heat is being absorbed, temperature of hot source and working substance should be same
3
when heat is being rejected, temperature of cold source and working substance should be same
4
All options are correct