CSIR Physical Sciences: Questions 264 - 266 of 401

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Question number: 264

» Electromagnetic Theory » Radiation- From Moving Charges

Appeared in Year: 2014

MCQ▾

Question

An electromagnetically – shielded room is designed so that at a frequency Equation the intensity of the external radiation that penetrates the room is 1 % of the incident radiation. If Equation is the conductivity of the shielding material, its minimum thickness should be –

(Given that Equation ) (June – 2014)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 265

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2014

MCQ▾

Question

The recently discovered Higgs boson at the LHC experiment has a decay mode into a photon and a Z boson. If the rest masses of the Higgs and Z boson are Equation and Equation respectively, and the decaying Higgs particle is at rest, the energy of photon will approximately be – (June – 2014)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 266

» Quantum Mechanics » Variational Method

Appeared in Year: 2013

MCQ▾

Question

The bound on the ground state energy of the Hamiltonian with an attractive delta – function potential, namely Equation

Using the variational principle with the trial wavefunction Equation is – Equation (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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