CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 196  198 of 463
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Question number: 196
» Quantum Mechanics » SpinStatistics Connection
Appeared in Year: 2011
Question
The Hamiltonian of an electron in a constant magnetic field is given by where is a positive constant and denotes the Pauli matrices. Let and be the unit matrix. Then the operator simplifies to – (June)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 197
» Thermodynamic and Statistical Physics » Phase Space
Appeared in Year: 2011
Question
Consider the transition of liquid water to steam as water boils at a temperature of 100^{0} C under a pressure of 1 atmosphere. Which one of the following quantities does not change discontinuously at the transition?  (June)
Choices
Choice (4)  Response  

a.  The internal energy 

b.  The entropy 

c.  The specific volume 

d.  The Gibbs free energy 

Question number: 198
» Nuclear and Particle Physics » Semiempirical Mass Formula
Appeared in Year: 2014
Question
If the binding energy B of a nucleus (mass number A and charge Z) is given by,
; where, then the Z for the most stable isobar for a nucleus with is –
(December)
Choices
Choice (4)  Response  

a.  68 

b.  92 

c.  84 

d.  72 
