Electrodynamics Definition and 419 Threads

Help on "Introduction to Electrodynamics 3rd edition by David J. Griffiths" I'm studying that book right now, but I'm having a hard time understanding... Can someone explain what a dirac delta function is and how to use it? I also don't understand the what is the electrostatic boundary...

help electrodynamics... dear friends i want to know more whether there is any book that gives solutions to griffiths electrodynamics problems :-p

what is basically the concept of bound charges in electrodynamics??

I've been planning to get myself a minilibrary consisting of the classic books in various subjects. So far I've decided to get Goldstein for classical mechanics and Jackson for electrodynamics. On the top of those I think I should have books of "similiar status" for QM, statistical physics...

Listen up guys... I am new on this forum... I'm danish and i currently go in the 11th grade or as we call it here: Gymnasium... Here is my problem, I am making a homepage as a physics project about electris and first of all i need to know what the smartest way to design this site. There...

I have been thinking about this problem for a few days and it's been keeping me up; I must be missing something, I just don't know what. I would appreciate anyone shedding some light on this: Assume an inertial frame of reference and all external fields are negligible. 1. Say you have...

I am looking for a reference book to use besides Griffiths. I find the explanations in Griffiths to be disconnected, and I have to work very very hard to make out what he is trying to explain. And then when I try the problems in the book I am handicapped (completely stuck). Most of the books I...

I hope I am in the right forum. In relativistic electrodynamics, if the electric, E and magnetic, B fields are perpendicular to each other in reference frame S, can there be a reference frame, S' where E' = 0? If so, what will be the relative velocity, v?

Hiya. I'm going to be taking a Quantum Electrodynamics course next semester. I was wondering if anyone could recommend : a) Good sites on the subject b) Good books on the subject Thanks in advance!

Can someone explain me the left-hand rule in Electrodynamics?

I was working through the following problem: The negative termincal of a 12V car battery is connected to the car frame which can be regarded as 'ground', at a potential of 0V. What is the potential of the other terminal? The answer is +12V, but I cannot understand why. Could someone give...

Is it possible to solve for an E field from a charge density function using the Cauchy Integral Formulas from complex variables? Cauchy Integral Formula about a closed loop in the complex plane (Integral[f[z]/ (z-z0)^(n+1)dz = 2 pi i /n! d^n f(z0)/dz ]) that is the n derivative of f with...

I've been brushing up on electrodynamics before I start grad school when I encountered problem 5.42 in Griffith's Electrodynamics. I can get everything correct except the coefficient to work out. Any one know where I can find a solution to this problem...

I have a book talking about transient electron-positron pairs appearing and disappearing inside a hydrogen atom which effects the attractive force between the proton and the electron, okay I'm fine with that. It then goes on to say that the effect is only over short distances because of the...

May anyone please show me how to derive the "magnetic field energy density" in a medium, which equals \frac{1}{2}H \cdot B? I would be very pleased if anyone could show me how to derive (step-bystep) the conservation of energy equation *in a medium* (not in vacuum) i.e. \nabla\cdot S +...

One question has disturbed me long time, I don't know the distinction between quantum electrodynamics and quantum field theory. By the way, which quantum field theory or quantum electrodynamics textbook is prefer?

Hi, This is my first post, am excited to be here. Cutting to the chase here, i have a question that has been bothering me for a while. The problem is there is a charged cylinder with charge say +1, and i have to charges outside say at a distance 'd' from the center of the cylinder such that...

A metal bar of mass m slides frictionlessly on two conducting rails a distance l apart as shown in the attached Figure 1. A resistor R is connected across the rails and a uniform magnetic field B, directed into the page fills the entire region. a) If the bar is moving to the right at speed...

Im wondering what products/technologies that would not have been poosible without the theories of Quantum electrodynamics, not things that these theories appear to explain.