MEDIUM
11th ICSE
IMPORTANT
Earn 100

A Carnot engine whose low-temperature reservoir is at 7°C has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how many degree should the temperature of the high-temperature reservoir be raised?

Important Questions on Carnot's Heat Engine : Second Law of Thermodynamics

EASY
11th ICSE
IMPORTANT
The law of thermodynamics which leads to the conclusion that it is impossible to convert 'all' the heat extracted from a hot source into work is :
MEDIUM
11th ICSE
IMPORTANT
A Carnot engine, whose efficiency is 40%, takes in heat from a source maintained at a temperature of 500 K. It is desired to have an engine of efficiency 60%. Then, the intake temperature for the same exhaust (sink) temperature must be
MEDIUM
11th ICSE
IMPORTANT
The efficiency of Carnot's heat engine is determined by the temperature of :
EASY
11th ICSE
IMPORTANT
Theoretically, the efficiency of a Carnot engine is 100 % when the temperature of the sink is :
EASY
11th ICSE
IMPORTANT
A Carnot engine operation between temperatures T1 and T2 has efficiency 16. When T2 is lowered by 62 K, its efficiency increases to 13. Then T1 and T2 are, respectively,
MEDIUM
11th ICSE
IMPORTANT
A Carnot engine has an efficiency of 40%. The temperature of the sink is 300 K. By how much should the temperature of the source be increased so as to increase the efficiency to 60% ?
MEDIUM
11th ICSE
IMPORTANT
The temperatures of the source and the sink of a Carnot's engine are 0°C and 0°F respectively. The efficiency of the engine will increase if temperature(s) of :