AIPMT 2015 | Heat and Thermodynamics Question 42 | Physics

The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is $$-$$20^oC, the temperature of the surroundings to which it rejects heat is

11^oC

21^oC

31^oC

41^oC

AIPMT 2015

MCQ (Single Correct Answer)

-1

Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is

$${1 \over 2}$$

$${2 \over 3}$$

$${3 \over 4}$$

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-1

Figure below shows two paths that may be taken by a gas to go from a state A to a state C.

AIPMT 2015 Cancelled Paper Physics - Heat and Thermodynamics Question 68 English

AIPMT 2015 Cancelled Paper Physics - Heat and Thermodynamics Question 68 English

In process AB, 400 J of heat is added to the system and in process BC, 100 J of heat is added to the system. The heat absorbed by the system in the process AC will be

460 J

300 J

380 J

500 J

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-1

A Carnot engine, having an efficiency of as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is

90 J

1 J

100 J

99 J

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Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution