MHT CET Medical202622 April 2026Evening ShiftPhysicsThermodynamicsActual
For the Carnot heat engine, if the temperature of the hot reservoir is increased, then efficiency of the Carnot engine
Options
- Adecreases.
- Bincreases.
- Cremains constant.
- Dfirst increases and then becomes constant.
Correct answer
B. increases.
Step-by-step solution
The efficiency of a Carnot engine is given by the formula: = 1 - T_C T_H where T_C is the temperature of the cold reservoir and T_H is the temperature of the hot reservoir. When the temperature of the hot reservoir T_H is increased, the ratio T_C T_H decreases. As a result, the value of 1 - T_C T_H increases, which means the efficiency of the Carnot engine increases. Answer: increases.