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Physics : Recent Questions and Answers (Page 10)

Find answers to your questions about Physics or help others by answering their Physics questions.

Faradays law and rate of change of flux

consider a table with the a uniform magnetic field of flux density B coming directly out of it, the field lines are perpendicular to the the surface of the table,...

Asked on 12/19/2021

2 answer

How the electric field of those dipoles created in that directions? (configuration added)

I am a little bit confused how the electric field produced by dipole $P_1$ at $vec{r_2}=(ell,0,0)$ is equal...

Asked on 12/19/2021

0 answer

Topologically massive $p$-form gauge fields in arbitrary dimensions

$newcommand{d}{mathrm{d}}$In $d=2p+1$ dimensions one can have topologically massive $p$-form abelian gauge fields $AinOmega^p(X_{2p+1})$ by considering a Maxwell–Chern–Simons action:$$S[A] = int_{X_{2p+1}} frac{1}{2g^2}d Awedgestard A +...

Asked on 12/19/2021

0 answer

Multiplicity of distinguishable particles

I have a problem in mind. There are 2 particles in a box. If they are distinguishable, there are 4 microstates represented by the picture below. If the particles are...

Asked on 12/19/2021

1 answer

Trying to understand a visualization of contravariant and covariant bases

I was trying to intuitively understand the covariant and contravariant bases for a coordinate system and I came across this image on Wikipedia: Edit: After reading...

Asked on 12/19/2021

6 answer

Can a black hole absorb linear momentum?

I know that black holes maintain the linear momentum of the object that created it. But if I throw a baseball into a black hole, will it absorb that momentum...

Asked on 12/17/2021

1 answer

Basic question about valence/conduction bands

In most introductions to solid state physics that I've read, they explain the origin, basically, of the band gap as follows: By doing a superposition of the standing waves inside...

Asked on 12/17/2021

1 answer

Einstein's relativity of simultaneity train/embankment thought experiment

Einstein's thought experiment I'm referring to is this one:http://www.bartleby.com/173/9.html briefly: train/embankment experiment is where lightning strikes at either ends of the running train (points A and B)...

Asked on 12/17/2021

3 answer

Expanding the Green's function in spherical harmonics

Hello and thanks for reading. I'm currently working through electrodynamics from Purcell supplemented by Jackson and online notes. I've read up the basic cases demonstrating the method of image charges,...

Asked on 12/17/2021

1 answer

Computing velocity and rotation of rigid body after application of force

Suppose we have a rigid body (or even a collection of point masses connected via rigid rods). Suppose this body is floating in space. Suppose we apply a force on...

Asked on 12/17/2021

3 answer

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