CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 130  132 of 463
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Question number: 130
» Quantum Mechanics » Commutators and Heisenberg Uncertainty Principle
Appeared in Year: 2014
Question
Suppose Hamiltonian of a conservative system in classical mechanics is; where is a constant and and are the position and momentum respectively. The corresponding Hamiltonian in quantum mechanics, in the coordinate representation, is – (December)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 131
» Electronics and Experimental Methods » Semiconductor Devices » Junctions
Appeared in Year: 2014
Question
A junction is made between a metal of work function and a doped semiconductor of work function with. If the electric field at the interface has to be increased by a factor of 3, then the dopant concentration in the semiconductor would have to be – (December)
Choices
Choice (4)  Response  

a.  Decreased by a factor of 

b.  Decreased by a factor of 3 

c.  Increased by a factor of 3 

d.  Increased by a factor of 9 

Question number: 132
» Thermodynamic and Statistical Physics » Free Energy
Appeared in Year: 2012
Question
The free energy of gas of N particles in a volume V and at a temperature T is where is a constant and denotes the Boltzmann constant. The internal energy of the gas is – (June)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

