SSC SSC JE Mechanical 2025 Mock Test Series (Paper 1 & Paper 2) Thermodynamics Second Law of Thermodynamics and Entropy Entropy and Irreversibility
An electric motor of 10 kW is subjected to a braking test for 1 hour. The heat generated by the frictional forces in the process is transferred to the surroundings at 27°C. The resulting entropy change will be
1
90 kJ/K
2
180 kJ/K
3
120 kJ/K
4
100 kJ/K