CSIR Physical Sciences: Questions 384 - 387 of 401

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Question number: 384

» Electromagnetic Theory » Laplace and Poisson Equations

Appeared in Year: 2011

MCQ▾

Question

A static, spherically symmetric charge distribution is given by Equation , where A and K are positive constants. The electrostatic potential corresponding to this charge distribution varies with Equation as, (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Passage

Equation Chromium ions cubic centimeter. All the atoms excited by the Equation radiation decay rapidly to level Equation which has a lifetime Equation

Three energy levels for Chromium ions

Three Energy Levels for Chromium Ions

In figure three distinct energy levels are shown. All atoms excited by radiation decay.

(June)

Question number: 385 (1 of 2 Based on Passage) Show Passage

» Atomic & Molecular Physics » Optical Pumping

Appeared in Year: 2011

MCQ▾

Question

The minimum pump power required (per cubic centimeter) to bring the system to transparency, i. e. , zero gain, is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 386 (2 of 2 Based on Passage) Show Passage

» Atomic & Molecular Physics » Population Inversion

Appeared in Year: 2011

MCQ▾

Question

Assuming that there is no radiation of wavelength Equation present in the pumping cycle and that the pumping rate is R atoms per Equation , the population density in the level Equation builds up as:

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Passage

In the absence of an applied torque a rigid body with three distances principal moments of inertia given by Equation is rotating freely about a fixed point inside the body. The Euler equations for the components of its angular velocity Equation are

Equation (June)

Question number: 387 (1 of 2 Based on Passage) Show Passage

» Mathematical Methods of Physics » Eigenvalues and Eigenvectors

Appeared in Year: 2011

MCQ▾

Question

The equilibrium points in Equation space are –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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