CSIR Physical Sciences: Questions 80 - 82 of 401

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Question number: 80

» Classical Mechanics » Dynamical System

Appeared in Year: 2011

MCQ▾

Question

A constant force F is applied to applied to a relativistic particle of rest mass m. If the particle starts from rest at t=0 , its speed after a time t is - (December)

Choices

Choice (4) Response

a.

Ftm

b.

c(IeFtmc)

c.

ctanh(Ftm)

d.

FctF2t2+m2c2

Question number: 81

» Quantum Mechanics » Motion in Central Potential » Angular Momentum Algebra

Appeared in Year: 2014

MCQ▾

Question

Consider the normalized wavefunction ϕ=a1ψ11+a2ψ10+a3ψ11 ; where ψlm is a simultaneous normalized eigenfunction of the angular momentum operators L2 and Lz , with eigenvalue l(l+1)2 and m respectively. If ϕ is an eigenfunction of the operator Lx with eigenvalue , then - (December)

Choices

Choice (4) Response

a.

a1=a3=12,a2=12

b.

a1=a3=12,a2=12

c.

a1=a3=12,a2=12

d.

a1=a2=a3=13

Question number: 82

» Thermodynamic and Statistical Physics » Micro- and Macro-States

Appeared in Year: 2012

MCQ▾

Question

The entropy of a system, S, is related to the accessible phase space volume Γ by S=kBlnΓ(E,N,V) where E, N and V are the energy, number of particles and volume respectively. From this one can conclude that Γ – (December)

Choices

Choice (4) Response

a.

Oscillates during evolution to equilibrium

b.

Does not change during evolution to equilibrium

c.

Is a maximum at equilibrium

d.

Is a minimum at equilibrium

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