CSIR Physical Sciences: Questions 217  220 of 389
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Question number: 217
» Thermodynamic and Statistical Physics » Free Energy
Appeared in Year: 2013
Question
If the energy dispersion of a two – dimensional electron system is , where is the velocity and k is the momentum, then the density of states depends on the energy as, (June)
Choices
Choice (4)  Response  

a. 
 
b.  Constant  
c. 
 
d.  E 
Question number: 218
» Electromagnetic Theory » Scalar and Vector Potentials
Appeared in Year: 2013
Question
The components of a vector potential are given by,
Where k is constant. The three components of the electric field are – (June – 2013)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 219
» Quantum Mechanics » SpinStatistics Connection
Appeared in Year: 2013
Question
Consider three particles A, B and C each with an attribute S that can take two values Let and at a given instant. In the next instant, each S value can change to with probability . The probability that remains unchanged is – (June – 2013)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 220
» Classical Mechanics » Conservation Laws and Cyclic Coordinates
Appeared in Year: 2012
Question
A planet of mass m moves in the gravitational field of the Sun (mass M). If the semi – major and semi – minor axes of the orbit are and respectively, the angular momentum of the planet is – (December)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
