AIPMT 2015 | Heat and Thermodynamics Question 33 | Physics

AIPMT 2015

MCQ (Single Correct Answer)

-1

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

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

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-1

The ratio of the specific heats $${{{C_p}} \over {{C_v}}} = \gamma $$ in terms of degrees of freedom (n) is given by

$$\left( {1 + {2 \over n}} \right)$$

$$\left( {1 + {n \over 2}} \right)$$

$$\left( {1 + {1 \over n}} \right)$$

$$\left( {1 + {n \over 3}} \right)$$

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