EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 27 - Thermodynamics>AP EAPCET 2021 (19-Aug Afternoon)>Q 9

EASY

AP EAPCET

IMPORTANT

Earn 100

Which one of the graphs below best illustrates the relationship between internal energy $U$ of an ideal gas and temperature $T$ of the gas in $K$ ?

40% studentsanswered this correctly

Important Questions on Thermodynamics

HARD

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 27 - Thermodynamics>AP EAPCET - 20 Aug 2021 Forenoon>Q 10

For a monoatomic ideal gas following the cyclic process $A B C A$ shown in the $U$ vs $ρ$ plot, identify the incorrect option:

Question Image

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 27 - Thermodynamics>AP EAPCET 2019 (21-Apr Shift-2)>Q 11

A Carnot engine of efficiency

40 %,

takes heat from a source maintained at a temperature of

500 K

. It is desired to have an engine of efficiency

60 %

. Then, the source temperature for the same sink temperature must be

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 27 - Thermodynamics>AP EAPCET 2018 (25-APR Shift-1)>Q 12

Freezing compartment of a refrigerator is at

0 ° C

and room temperature is

27.3 ° C

. Work done by the refrigerator to freeze

1 g

of water at

0 ° C

is

(L_{ice} = 80 cal g^{- 1})

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 27 - Thermodynamics>AP EAPCET 2021 (19-Aug Afternoon)>Q 13

A refrigerator with coefficient of performance

0.25

releases

250 J

of heat to a hot reservoir. The work done on the working substance is

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 27 - Thermodynamics>AP EAPCET - 20 Aug 2021 Afternoon>Q 14

A Carnot engine whose heat sink is at

27 ° C

has an efficieny of

40 %

. By how much should its source temperature be changed so as to increase its efficiency to

60 %

?