ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>NUMERICALS>Q 10

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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

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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 :

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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

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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 :

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ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 4

The efficiency of Carnot's heat engine is determined by the temperature of :

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ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 5

Theoretically, the efficiency of a Carnot engine is

100 %

when the temperature of the sink is :

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ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 6

A Carnot engine operation between temperatures

T_{1}

and

T_{2}

has efficiency

\frac{1}{6}

. When

T_{2}

is lowered by

62 K

, its efficiency increases to

\frac{1}{3}

. Then

T_{1}

and

T_{2}

are, respectively,

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ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 7

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 %

?

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IMPORTANT

ISC Physics Class XI Part 1>Chapter 23 - Carnot's Heat Engine : Second Law of Thermodynamics>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 8

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 :