CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 54  56 of 463
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Question number: 54
» Thermodynamic and Statistical Physics » BoseEinstein Condensation
Appeared in Year: 2014
Question
An ideal Bose gas is confined inside a container that is connected to a particle reservoir. Each particle can occupy a discrete set of single – particle quantum states. If the probability that a particular quantum state is unoccupied is 0.1, then the average number of bosons in that state is – (December)
Choices
Choice (4)  Response  

a.  10 

b.  11 

c.  8 

d.  9 

Question number: 55
» Electronics and Experimental Methods » Precision and Accuracy
Appeared in Year: 2014
Question
One gram of salt is dissolved in water that is filled to a height of 5 cm in a beaker of diameter 10 cm. The accuracy of length measurement is 0.01 cm while that of mass measurement is 0.01 mg. When measuring the concentration C, the fractional error is – (June)
Choices
Choice (4)  Response  

a.  0.5 % 

b.  0.28 % 

c.  0.14 % 

d.  0.8 % 

Question number: 56
» Quantum Mechanics » WaveFunction in Coordinate Representations
Appeared in Year: 2014
Question
Consider a system of two non – interacting identical fermions, each of mass m in an infinite square well potential of width a. (Take the potential inside the well to be zero and ignore spin. ) The composite wavefunction for the system with total energy is – (June)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

