Q138 / 160 · AP EAMCET 2025 (21 MAY SHIFT 2) · Physics

A Carnot engine having efficiency $60 \%$ receives heat from a source at a temperature 600 K. For the same sink temperature, to increase its efficiency to $80 \%$, the temperature of the source is

A
300 K
B
900 K
Correct answer
C
1200 K
D
720 K

Hence, the correct answer is option: 'C'.

Relevant Questions

The efficiency of a Carnot's heat engine is . If the temperature of the source is decreased by and the temperature of the sink is increased 27 May, 2025 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
The ratio of the efficiencies of two Carnot engines A and B is 1.25 and the temperature difference between the source and the sink is same i26 May, 2025 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
A refrigerator of coefficient of performance 5 that extracts heat from the cooling compartment at the rate of 250 J per cycle is placed in a24 May, 2025 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
In a Carnot engine, if the work done during isothermal expansion is more than the work done during isothermal compression, then the efficien23 May, 2025 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
In a Carnot engine, if the absolute temperature of the source is more than the absolute temperature of the sink, then the efficiency of the 23 May, 2025 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
If a heat engine and a refrigerator are working between the same two temperatures and , then the ratio of efficiency of heat engine to coeff23 May, 2025 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics