Thermodynamics (NEST (National Entrance Screening Test) Physics): Questions 1 - 4 of 5

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 47 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 100.00 or

How to register?

Question number: 1

» Thermodynamics » Thermodynamic Processes

Appeared in Year: 2007

MCQ▾

Question

of hydrogen gas at standard temperature and pressure are contained in a cylinder with a movable piston. The walls of the cylinder and also the piston are insulated. If the gas is compressed to one third of its original volume, the pressure of the gas will be –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2

» Thermodynamics » Carnot Engine and Its Efficiency

Appeared in Year: 2013

MCQ▾

Question

An engine absorbs heat at a temperature of and exhausts heat at a temperature of . The engine operates at the maximum possible efficiency. The amount of work the engine performs for of heat input can be –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 3

» Thermodynamics » Thermal Equilibrium

Appeared in Year: 2015

MCQ▾

Question

A body of mass with specific heat at temperature is brought into contact with an identical body at temperature . The system is isolated from the surroundings during the process. The change in entropy of the system is –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 4

» Thermodynamics » Carnot Engine and Its Efficiency

Appeared in Year: 2015

MCQ▾

Question

A Carnot engine is made to operate as a refrigerator. This refrigerator is used to freeze water at to ice at and the heat from the working substance is discharged into a large tank containing water at . The latent heat of fusion of ice is . The minimum amount of work required to freeze of water is closed to –

Choices

Choice (4) Response

a.

b.

c.

d.

f Page