Physics Questions, Problems & Solutions : TransWikia.com ~ Page 196

What is the governing differential equation on the interface of two areas with different permeabilities in magnetostatics?

The boundary condition requires that parallel component of magnetic field intensity to be continuous on the interface of two adjacent media with different permeabilities. for example on a 2d plane...

Asked on 07/10/2021

1 answer

How to show that the interaction $p + bar p rightarrow pi^0 + pi^0$ is forbidden in the electromagnetic and strong interaction?

(I am at the introductory level of particle physics) I know that the parity is conserved in strong and electromagnetic interaction, so I would like to show that the charge...

Asked on 07/10/2021

1 answer

Plateaus in Quantum Hall effect

Why do the plateaus in the Quantum Hall Effect appear phenemenologically? Something to do with the 1D transport for the edge states?...

Asked on 07/10/2021

1 answer

Why do low concentrations of $rm H_2$ in $rm He$ gas exhibit lower thermal conductivity than either?

Thermal conductivity of He+H2 mixtures, as a function of molar concentration of H2, exhibit a minimum at around 14% H2. See Fig. 2 below from "Thermal conductivity...

Asked on 07/10/2021

1 answer

Is free space a 'dielectric'?

The physical constant $epsilon_0$ is usually called "permittivity of free space" or "vacuum permittivity". Griffiths says:I dislike the term, for it suggests that the vacuum is just a special...

Asked on 07/10/2021

3 answer

Physical meaning of the Ising Hamiltonian

I have question about the Ising model, specifically the Ising Hamiltonian. From what I have read, the Ising Hamiltonian describes the energy of the system of spins with a certain...

Asked on 07/10/2021

2 answer

Find the density of states in X points of Silicon

The problem statement is given verbatimIn Si, the dispersion relation at the [001] X points is: $$E=frac{hbar^2}{2}left(frac{k_x^2+k_y^2}{m_t}+frac{(k_z-G)^2}{m_l}right)$$ where G is the reciprocal lattice vector at X points. Find the...

Asked on 07/10/2021

0 answer

Does an equal $D$ (Displacement current) on two surfaces gurantee that there is no $Q$, Or is it the other way round no $Q$ hence no change in $D$?

There is a question in the first chapter of RF Harrington's book asking to show that the $Q$ (charge density) will be zero if there is no source. I...

Asked on 07/10/2021 by Pratik Vadher

0 answer

Question about Ekert protocol of quantum key distribution

recently I've self-studied the quantum computing from the book Quantum Computing for Everyone by Chris Bernhardt. Everything is so far so good until I came across with the Ekert protocol...

Asked on 07/10/2021 by Syndicate7

0 answer

Desorption vs reflection (or sticking coefficients) in thermal physical vapor deposition (PVD) of gold

I'm having some issues squaring competing concepts behind the kinetics of adatom deposition in thermal PVD. Mattox (Handbook of Physical Vapor Deposition) repeatedly states Au atoms vaporized via thermal...

Asked on 07/10/2021 by ZnPVD

0 answer

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