railway RRB JE (CBT I + CBT II) Mock Test 2024 Thermodynamics Second Law of Thermodynamics and Entropy Efficiency of Reversible Heat Engine
A heat engine receives heat at the rate of 1500 kJ/min and gives an output of 8.2 kW, then the thermal efficiency is-
1
47.20%
2
41%
3
32.80%
4
27.90%