CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 54 - 56 of 463

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Question number: 54

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2014

MCQ▾

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

MCQ▾

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 » Wave-Function in Coordinate Representations

Appeared in Year: 2014

MCQ▾

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.

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