Electrodynamics Definition and 404 Threads

Homework Statement A long cylinder of radius R carries a magnetization \vec{M}=Ks^{2}\hat{\phi} where k is a constant, s is the distance from the axis, and \hat{\phi} is the usual azimuthal unit vector. Find the magnetic field due to \vec{M} for points inside and outside the cylinder.Homework...

1. Hi everyone, I'm a final year in university and have got a "Relativity and Electrodynamics" exam coming up. I'm going through past papers and can't seem to work out how to tackle this problem, any help would be much appreciated. Suppose in some inertial frame S a photon has 4-momentum...

Homework Statement Have a permanently (uniformly not radially) polarized sphere surrounded by a charged conductor How is the charge on the conductor distributed (the added charge)? Homework Equations The Attempt at a Solution Since the conductor cancels the field generated by...

Homework Statement A surface at z = 0 is held at potential V (x, y) = V0 cos(qx) sin(qy). Find the potential in the region z > 0. Homework Equations Laplace's equation in Cartesian coordinates The Attempt at a Solution I wrote at least a page of my past 2 attempts at a solution...

I just finished high school and i am very much interested in electrodynamics and electromagnetic waves and i would like to study it in greater detail..I am good at mathematics too.However, i don't like electronics, i.e, diodes, transistors and stuff. So what undergraduate course can i take...

Homework Statement Consider a very thin flat plate positioned in the x-z plane. The plate is semi-infinite with an edge running along the z axis. The plate is held at potential V0. Using techniques from teh theory of complex variables a solution is determined to be: V(x,y) =...

Hello, I have a question. I have being trying to get my hands on any QED book i can cause i love it! but once i found out that the electric and magnetic fields were actually quantized as photons, and that the force between charges is mediated by light, i asked myself a question which i have...

In electrostatic case, Gauss's law can be derived from Columb's law, so we can regard experimental evidence for Columb's law as evidence of Gauss's law. But what about non-static case? In this case we know columb's law is no longer valid, so we need experimental evidence to justify Gauss's law...

I'm looking to get a book on introductory Electrodynamics. I've already seen recommendations for This one: https://www.amazon.com/dp/013805326X/?tag=pfamazon01-20 But it seems really expensive. Are there any other good books for ED? Also, does intro ED require linear algebra?

How important is classical electrodynamics to a good understanding of physics? Why should I bother to learn it if it has been replaced by QED? Also what are some good books for classical ED if It is in fact important to learn it?

Hello all, I have recently been taught the method of imagging with opposite point charges. The stereotypical example of a point charge above an infinit conducting plate comes fine but i can't grasp the sphere example. It is shown http://en.wikipedia.org/wiki/Method_of_image_charges" , I...

I am going to take Electrodynamics & Thermodynamics for the next semester, I am wondering if there are good problem books with solutions on these topics? Any suggestions will be appreciated.

I'm having some trouble understanding this module. It would be great if anyone could help. In a homogeneous nonconduction region where μr = 1, find εr and ω if E=30(pi)e[i(ωt-4/3y)] in z direction H=0.1e[i(ωt-4/3y)] in x direction I am to understand that for a homognous nonconduction region...

Hello fellow scientists and engineers. I am a Physics-EE double major at the U of MN (twin cities). I was originally focused on doing pure physics and obtaining a research position in academia or government, but various pressures have turned me from this path, causing me to pick up a second...

Electrodynamics q! Struggling with this module, if someone could get me started in the right direction that'd be great! An electric field is given by E(r,theta,phi,t)=A(sin theta/r)(cos(kr-wt)-(1/kr)sin(kr-wt)) in phi direction Show that E obeys all 4 of Maxwells equations in vacuum...

I'm looking for something like Arnold's "Mathematical Methods of Classical Mechanics" that applies to electrodynamics/SR/GR. I'd prefer it exterior calculus based. So far, I'm leaning towards Thirring: https://www.amazon.com/dp/0387406158/?tag=pfamazon01-20 Anyone know anything about...

hello dear friends, i have another problem in physics, it has to do with electrodynamics. if we have a sphere with total loading Q which is uniformly distributed throughout it's volume, how can we find the voltage for R/2<=r<=R and for r>=R? (assume that we know E). i know that Va - Vb =...

Homework Statement I am really confused in my electrodynamics class. I have the following function. f(x) = \delta (x + \alpha ) + \delta(x -\alpha) How do i convert this into Fourier Tranform ? Those are dirac delta functions on either sides of the origin. Homework Equations...

I'm just kind of curious how our school's E&M-I class compares to others because it seems like we are learning things at an advanced level (very fun though it can be intense). We started the year off with Special Relativity then went into Vectors; nothing weird yet. Then instead of doing...

A simple question: if we have two particles with opposite charge, and nothing else going on to affect the field, then how do they move? If they start out stationary with respect to each other, then they accelerate toward each other, and this current creates a magnetic field. That would slow...

Homework Statement An electron moves in a helix : \vec{r}(t)=v_{z}t \hat{z}+a e^{i\omega_{0}t}(\hat{x}-i\hat{y}), where a is the radius of the helix and v_{z} the relativistic z-component of the velocity. 1) Find the position vector of the electron in a system of reference that is moving...

Hi Folks J. D. Jackson's last edition to his Classical Electrodynamics (3rd edition) was ten years ago. Are most graduate physics programs still using his text? It appears that some programs maybe using Schwinger's book. What other graduate level texts are in use? Thank you

Is there a derivation for the classical electrodynamic Lagrangian? I have taken a look at a few textbooks that I have on hand but all of them just state the Lagrangian (in the voodoo four-vector talk, \glares) without explaining the reasoning behind it. I know that the Lagrangian for a charged...

What physical quantities are these differential forms in classical electrodynamics? I read the paper ofhttp://arxiv.org/abs/physics/0005084" (A gentle introduction to the foundations of classical electrodynamics: The meaning of the excitations (D,H) and the field strengths (E, B)). The...

It's evident that ampere's law is used to calculate the magnetic field produced by flowing charges. Can I use Gauss's Law to calculate the electric field produced by the flowing charges also? I ask this question because in the middle of a solid conductor, there is a flow of charge. However...

Has anybody read https://www.amazon.com/dp/0226519589/?tag=pfamazon01-20? Why isn't it used as an alternative to Jackson's book? The only thing that is missing is that it doesn't contain problem sets (from what an Amazon reviewer mentioned), but that can be overcome by using problems from...

Hello everyone, I wonder if a textbook like the one I described in the subject line exists - most of the classical electrodynamics textbooks I've looked at assume you already have a solid background in vector calculus. I'm trying to do a self-study in electrodynamics, and while I have taken...

I would like to know recommendations for the best way to prepare for Jackson's electrodynamics next Fall. I have taken Griffith's E&M as well as the usual undergraduate math (linear algebra, advanced calculus, complex variables, probability). I realize there have been some similar posts to this...

Homework Statement ok, for one of the prioblems I'm given the equations of an electric field: Ex(z,t) = E0sin(kz-wt) Ey(z,t) = E0cos(kz-wt) for a circularly polarized plane wave of light traveling in the z direction. I have to show the magnetic field, energy density, and Poynting vector...

Hi, I am taking an electrodynamics course. The textbook we are ussing is Introduction to electrodynamics by Griffiths. We are taking it from chapter 8. I am having an extremely hard time in learning it. Can somebody recommend me a few good books, webpages to learn? Also any tips on how to...

1. Invariants in field strength The first part of the question asked you to calculate the Lorentz scalars by contracting the field strength tensor (F) and it's dual (G): FF, GG and FG (index's omitted) and formed ±2(B²-E²/c²) and -4/c(E.B). The next part asked: Are there any other...

Hi! It's possible to construct a electromagnetic field, such that \vec{F}:=\vec{E} + i\cdot \vec{B}. Now the real part is the electric and the imaginary part is the magnetic field. Then, for example, the maxwell equations take the form \nabla \cdot \vec{F} = \rho, \qquad \rho \in...

Can someone tell me what Weber's electrodynamics is all about? I ran across it while reading Jackson's Classical electrodynamics. Thanks!

Homework Statement Hi all. Lets say a voltmeter registers (measures) the following quantity: V = \int_a^b{\textbf E\cdot d\textbf l} Does this mean that it measures V = V(b)-V(a), i.e. the potential at b subtracted by the potential at a? Thanks in advance.Niles.

Hi, a homogeneous charged hollow sphere with the radius R and the complete charge Q is rotating with constant angular velocity omega around a fixed axle. How to calculate the magnetic field at the north pole? I have this hints: The ring current I with the radius small r excites on...

In http://en.wikipedia.org/wiki/Covariant_formulation_of_classical_electromagnetism It is written: \mathcal{L} \, = \, \mathcal{L}_{\mathrm{field}} + \mathcal{L}_{\mathrm{int}} = - \frac{1}{4 \mu_0} F^{\alpha \beta} F_{\alpha \beta} + A_{\alpha} J^{\alpha} \,. a personal...

Homework Statement Hi all. Please take a look at the attached circuit. I want to find the current through the capacitor, and of course I will use Kirchhoffs laws for AC-current. In this case, ε(t) = ε_0*cos(ωt). My question is: If this was an DC-circuit, I would define e.g...

Homework Statement Hi all. Please take a look at the attached circuit. I've have found the amplitude of the current through the resistance to be: \left| {I_0 } \right| = \frac{{\varepsilon _0 }}{{\left| {R - \frac{R}{{\omega ^2 LC}} + \frac{i}{{\omega C}}} \right|}}, where ε_0 is the...

Is there anything like *crash course* for electrodynamics ?

When finding the polarization of the dielectric portion between the two plates using P=\epsilon_{0} X_{e}E, why would we use the E-field in the air portion (as is done in the solutions manual and here: http://www.getofftheinternet.net/s_10077.pdf ) instead of solving for the E-field in the...

Galilean Electrodynamics?!? I finished reading The History of Pi by Petr Beckman, thoroughly enjoyed it and wondered what other works/activities the author was involved with. Soo I eventually came across this thing called "Galilean Electrodynamics" (which Beckman apparently had a hand in...

Homework Statement Hi all. Please take a look at the attached circuit, where the current is direct (i.e. DC). I have found the following differential equation using Kirchoff's laws: V=\frac{R_1+R_2}{R_2C}Q+R_1\frac{dQ}{dt}. I wish to solve this equation, and thus to find Q(t).The Attempt...

Homework Statement The question given is an electromagnetic wave incident on a vacuum metal interface. The wave is incident normally. We're given that the metal is a good conductor i.e. \omega \tau <<1 where \tau is the collision time of the metal and omega is the angular frequency. The metal...

Homework Statement This is from Prob. 2.25 Two point charges with separation d, P is a point at a distance z above the mid-point of the charges. The last sentence asked if one of the positive charges is changed to a negative one, what is the potential at P? What field does it suggest? Explain...

Hi guys, I came across On the Electrodynamics of Moving Bodies while searching the net on relativity. I started reading it cause I thought It would be quite fun to do, not hoping to understand allot of it. I understand the basic (no-mathematical) concepts behind relativity, but I would like to...

On the Z=0 plane the charge distribution is of the form \rhos=\rho0 sin( \alpha x )sin( \beta y ) find the potential everywhere, assuming that \phi(z\rightarrow±\infty)=0 according to the answer, we should look for a potential of the form A sin( \alpha x )sin( \beta y )f(z) (due to the...

Hello, I don't fully understand the meaning of Green function, and how one should use it. According to Jackson's "Classical Electrodynamics" - 'the method of images is a physical equivalent of the determination of the appropriate F(x, x') to satisfy the boundary conditions'. Where Green...

I'm engaged in self-study with advanced undergraduate-level physics, currently focusing on Griffith's Electrodynamics text. I'm enjoying the problem sets in the text, but I sure would love to do some lab-work here at home. Does anyone know any good references for E&M labs or experiments?

I was playing around with some manipulations of maxwell's equations and seeing if I could work out the wave equation for light. I get: (\nabla^2 -{\partial_{ct}}^2) \mathbf{B} = -\mu_0 \nabla \times \mathbf{J} (\nabla^2 -{\partial_{ct}}^2) \mathbf{E} = \nabla \rho/\epsilon_0 + \mu_0...

Hi: I've heard that in electromagnetism, there is a system of units called Lorentz - Heaviside system, and that in particle physics, tis system is used insted of the gaussian or the SI. Why do particle physicist use this system? and by the way, How do we go from the Gaussian...