MEDIUM
11th ICSE
IMPORTANT
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A Carnot's engine works between two temperatures whose difference is 100 K. If it absorbs 746 J of heat from the source and gives 546 J to the sink, calculate the temperatures of the source and the sink.

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

EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>NUMERICALS>Q 6
A Carnot's ideal heat engine operates between 227°C and 127°C. It absorbs 600 calories of heat from the source. How much work per cycle is the engine capable of performing? ( 1 calorie =4.2 joule)
EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>NUMERICALS>Q 7
A Carnot's reversible engine works with an efficiency of 50%. During each cycle, it rejects 150 calories of heat at 30°C. Calculate (i) temperature of the source, (ii) work done by the engine per cycle. (1 cal=4.2 J).
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>NUMERICALS>Q 8
The temperature of the sink of a Carnot engine is 27°C. If the efficiency of the engine is 40%, find the temperature of the source.
EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>NUMERICALS>Q 9
A reversible engine converts one-sixth of heat absorbed at the source into work. When the temperature of the sink is reduced by 82°C, the efficiency of the engine is doubled. Find the temperatures of the source and the sink.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>NUMERICALS>Q 10
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?
EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 1
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
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 2
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
ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 3
The second law of thermodynamics implies that :