CSIR Physical Sciences: Questions 53 - 56 of 401

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Question number: 53

» Electronics and Experimental Methods » Digital Techniques and Applications » Registers

Appeared in Year: 2013

MCQ▾

Question

If one of the inputs of J – K flip – flop is high and the other is low, then the outputs Q and Q¯ – (December)

Choices

Choice (4) Response

a.

Oscillate between low and high in race – around condition

b.

Follow the inputs and the circuit acts like an R – S flip – flop

c.

Are opposite to the inputs

d.

Toggle and the circuit acts like a T flip – flop

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 ΔCC 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 E=5π222ma2 is – (June)

Choices

Choice (4) Response

a.

2a[sin(πx1a)cos(πx2a)sin(πx2a)cos(πx1a)]

b.

2a[sin(πx1a)sin(2πx2a)+sin(2πx1a)sin(πx2a)]

c.

2a[sin(πx1a)sin(3πx22a)sin(3πx12a)sin(πx2a)]

d.

2a[sin(πx1a)sin(2πx2a)sin(2πx1a)sin(πx2a)]

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