CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 226  229 of 463
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Question number: 226
» Classical Mechanics » Conservation Laws and Cyclic Coordinates
Appeared in Year: 2013
Question
A particle of mass m is at the stable equilibrium position of its potential energy, ; where are positive constants. The minimum velocity that has to be imparted to the particle to render its motion unstable is – (June)
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Choice (4)  Response  

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Question number: 227
» Quantum Mechanics » SpinStatistics Connection
Appeared in Year: 2013
Question
A spin particle A undergoes the decay,
where it is know that B and C are also spin particles. The complete set of allowed values of the spin of the particle D is – (June)
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Choice (4)  Response  

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d. 


Question number: 228
» Atomic & Molecular Physics » Diatomic Molecules » Vibrational
Appeared in Year: 2013
Question
The phonon dispersion for the following one – dimensional diatomic lattice with masses and (as shown in figure)
is given by,
where is the lattice parameter and K is the spring constant. The velocity of sound is – (June)
Choices
Choice (4)  Response  

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Question number: 229
» Quantum Mechanics » Time Dependent Perturbation Theory
Appeared in Year: 2014
Question
The ground state eigenfunction for the potential , where is the delta function, is given by , where A and are constants. If a perturbation is applied, the first order correction to the energy of the ground state will be – (June – 2014)
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Choice (4)  Response  

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b. 


c. 


d. 

