Thermodynamics-Concept of Temperature (NEET Physics): Questions 32 - 35 of 36

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Question number: 32

» Thermodynamics » Concept of Temperature

MCQ▾

Question

A scientist says that the efficiency of his heat engine which operates at source temperature 107°C and sink temperature 27°C is 26%, then

Choices

Choice (4) Response

a.

Data are incomplete

b.

It is impossible

c.

It is possible but less probable

d.

It is quite probable

Question number: 33

» Thermodynamics » Concept of Temperature

MCQ▾

Question

An ideal gas is taken from point A to the point B, as shown in the P-V diagram, keeping the temperature constant. The work done in the process is

Graph of pressure vs volume from point A to B

Graph of Pressure vs Volume From Point A to B

In above figure we shows that expansion of ideal gas from point A to B.

Choices

Choice (4) Response

a.

12(PB+PA)(VBVA)

b.

(PAPB)(VBVA)

c.

12(PBPA)(VBVA)

d.

12(PBPA)(VB+VA)

Question number: 34

» Thermodynamics » Concept of Temperature

MCQ▾

Question

Six moles of an ideal gas performs a cycle shown in figure. If the temperature T A = 600K, T B = 800 K, T C = 2200K and T D = 1200. K, the work done per

System of ideal gas Temperature at A, B, C and D

System of Ideal Gas Temperature at a, B, C and D

In above figure we show six moles of an ideal gas performs a cycle.

Choices

Choice (4) Response

a.

60 KJ

b.

40 kJ

c.

20 kJ

d.

30 kJ

Question number: 35

» Thermodynamics » Concept of Temperature

MCQ▾

Question

A Carnot engine whose low temperature reservoir is at 17 C has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how. many degrees should the temperature of the high temperature reservoir be increased

Choices

Choice (4) Response

a.

280 K

b.

560 K

c.

840K

d.

380K

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