Thermodynamics-Concept of Temperature (NEET Physics): Questions 20 - 25 of 36

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Question number: 20

» Thermodynamics » Concept of Temperature

MCQ▾

Question

Efficiency of a Carnot engine is 50 % when temperature of outlet is 400 K. In order to increase efficiency up to 70 % keeping temperature of intake the same what will be temperature of outlet

Choices

Choice (4) Response
a.

690 K

b.

240 K

c.

460 K

d.

870 K

Question number: 21

» Thermodynamics » Concept of Temperature

MCQ▾

Question

The temperature of sink of Carnot engine is 27°C and Efficiency of engine is 40%. Then temperature of source

Choices

Choice (4) Response
a.

127°C

b.

227ºC

c.

27ºC

d.

327°C

Question number: 22

» Thermodynamics » Concept of Temperature

MCQ▾

Question

One mole of an ideal gas at an initial temperature of TK does 8 R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 53 , the final temperature of gas will be

Choices

Choice (4) Response
a.

(TA)K

b.

(T2A)K

c.

(T+5.33)K

d.

(T+A)K

Question number: 23

» Thermodynamics » Concept of Temperature

MCQ▾

Question

The efficiency of Carnot’s engine operating between reservoirs, maintained at temperatures 27 degree Celsius and -113 degree Celsius

Choices

Choice (4) Response
a.

0.4%

b.

50%

c.

0.75%

d.

46%

Question number: 24

» Thermodynamics » Concept of Temperature

MCQ▾

Question

An ideal gas at 25°C is compressed adiabatically to 27125 of its original volume. If γ=53 , then the rise in temperature,

Choices

Choice (4) Response
a.

530 K

b.

225 K

c.

405 K

d.

375 K

Question number: 25

» Thermodynamics » Concept of Temperature

MCQ▾

Question

One mole of a perfect gas in a cylinder fitted with a piston has a pressure P . volume V and temperature T. If the temperature is increased by 2 K keeping pressure constant, the increase in volume is

Choices

Choice (4) Response
a.

V274

b.

V91

c.

2V273

d.

V

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