AIPMT 2002 | Heat and Thermodynamics Question 76 | Physics

AIPMT 2002

MCQ (Single Correct Answer)

-1

The efficiency of Carnot engine is 50% and temperature of sink is 500 K. If temperature of source is kept constant and its efficiency raised to 60%, then the required temperature of sink will be

100 K

600 K

400 K

500 K

AIPMT 2001

MCQ (Single Correct Answer)

-1

A scientist says that the efficiency of his heat engine which work at source temperature 127^oC and sink temperature 27^oC is 26%, then

it is impossible

it is possible but less probable

it is quite probable

data are incomplete.

AIPMT 2000

MCQ (Single Correct Answer)

-1

To find out degree of freedom, the expansion is

$$f = {2 \over {\gamma - 1}}$$

$$f = {{\gamma + 1} \over 2}$$

$$f = {2 \over {\gamma + 1}}$$

$$f = {1 \over {\gamma + 1}}$$

AIPMT 2000

MCQ (Single Correct Answer)

-1

The (W/Q) of a Carnot engine is 1/6, now the temperature of sink is reduced by 62^oC, then this ratio becomes twice, therefore the initial temperature of the sink and source are respectively

33^oC, 67^oC

37^oC, 99^oC

67^oC, 33^oC

97 K, 37 K

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