CSIR Physical Sciences: Questions 298 - 300 of 389

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Question number: 298

» Quantum Mechanics » Timeindependent Perturbation Theory and Applications

Appeared in Year: 2012

MCQ▾

Question

The perturbation, H={b(ax),a<x<a0,otherwise acts on a particle of mass m confined in an infinite square well potential V(x)={0,a<x<a,otherwise

The first order correction to the ground – state energy of the particle is –

(December)

Choices

Choice (4) Response
a.

ba

b.

ba2

c.

ba2

d.

2ba

Question number: 299

» Electronics and Experimental Methods » Opto-Electronic Devices » Solar Cells

Appeared in Year: 2012

MCQ▾

Question

The output characteristic of a solar panel at a certain level of irradiance is shown in the figure below.

The output characteristic of solar panel

The Output Characteristic of Solar Panel

In figure the output characteristic of the solar panel at certain level of irradiance.

If the solar cell is to power a load of 5Ω , the power drawn by the load is –

(December)

Choices

Choice (4) Response
a.

45W

b.

50W

c.

73W

d.

97W

Question number: 300

» Atomic & Molecular Physics » Population Inversion

Appeared in Year: 2012

MCQ▾

Question

Consider the energy level diagram shown below, which corresponds to the molecular nitrogen laser.

 The energy level diagram

the Energy Level Diagram

In figure the energy level diagram is shown.

If the pimp rate R is 1020atomscm3s1 and the decay routes are as shown with τ21=20ns and τ1=1μs , the equilibrium populations of states 2 and 1 are respectively. (December)

Choices

Choice (4) Response
a.

1014cm3and2×1012cm3

b.

2×1012cm3and1014cm3

c.

zeroand1020cm3

d.

2×1012cm3and2×106cm3

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