Thermodynamics-Laws of Thermodynamics (NEST (National Entrance Screening Test) Physics): Questions 1 - 2 of 2

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Question number: 1

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

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Appeared in Year: 2019

Essay Question▾

Describe in Detail

A particle of mass moving in one – dimension satisfies the modified Schrodinger equation

Where is the velocity of the substrate. If now this particle is treated as Gaussian wave packet peaked at wave number , its group velocity will be

Explanation

Given

Treating it as a plane wave solution

Replacing and

… (96 more words) …

Question number: 2

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

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Appeared in Year: 2019

Essay Question▾

Describe in Detail

An ideal gas engine is run according to the cycle shown in the diagram below, where the process from to is known to be isochoric (i. e. maintaining constant).

Image shows The corresponding cycle

Image Shows the Corresponding Cycle

Image shows The corresponding cycle

Explanation

Since is isothermal process, and entropy is decreasing, so volume also decreases.

This condition can be checked from option for .

In process to , volume is constant (isochoric) so pressure temperature. Here temperature is decreasing in , so pressure also decreases from

… (29 more words) …

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