All Questions
Tagged with electromagnetism classical-mechanics
265
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Does electric and magnetic field from electromagnetic radiation are 2D based? [closed]
I'm getting into physics, specially in electromagnetism.
When we're talking about electromagnetic radiation. Does it has a 2D shape when it's propagating through space?
Does Maxwell's equations ...
- 11
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82
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Would a nearby electron be attracted/repulsed due to the oscillating $\vec E$ and $\vec B$ field of a passing electromagnetic wave? [closed]
I had just read up on the propagating electromagnetic wave equation, and realized that I do not know how to apply it in practice beyond knowing the equation...
Suppose
$$\vec E (x, t) = \begin{bmatrix}...
- 593
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57
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The specific heat of an EM wave in classical physics
I'm reading Dirac’s Principles of Quantum Mechanics and, in the first chapter, he states:
… There must certainly be some internal motion in an atom to account for its spectrum, but the internal ...
- 1,080
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Dipole radiation of a non-relativistic electron in elliptic motion [closed]
I'm trying to solve the following problem:
A non-relativistic electron is moving in elliptical motion inside a positively charged cylinder of homogenous charge density $\rho$. The initial radius ...
- 15
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How to describe the dynamics of a magnetic monopole charge in the external EM field using a Lagrangian in terms of the EM potentials?
The equation of motion of a magnetic charge in the fixed external electromagnetic field $\mathbf{E},\mathbf{B}$ is
$$
\frac{d}{dt}(\gamma m \mathbf{v})=q_m(\mathbf{B}-\mathbf{v}\times\mathbf{E}),
$$
...
- 21
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Charged pendulum and a fixed point charge
!My set-up is the following: i have an iron bolt suspended on a string next to an electromagnet, of which I steadily increase the voltage and thereby the magnetic field. Supposing the force is linear ...
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A travelling magnet passing through a static ring magnet, overall net acceleration question
If I have a magnet travelling through empty space, and it passes through a static (infinite mass for all intents and purposes) ring magnet, in such a way that it is being attracted towards the ring as ...
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Can a positive charged body moving inside a positively charged hollow sphere crash into the sides?
One can use the Gauss' law, or the solid angle approach to prove that the electric potential inside a homogeneously charged hollow sphere is uniform. This implies that a positively body moving inside ...
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Perturbation of central field potential
i`d like to consider system with Coulomb potential: $U = -\frac{\alpha}{r}$ and constant magnetic field.It is easy to write Lagrangian function:
$$ L = \frac{m}{2}(\dot{\rho}^2 + \rho^2\dot{\phi}^2) + ...
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The correct formulation of temperature resistivity in Drude model
In this link the document uses $F = ma = qE$ to get drift velocity(Eq.9.6,page10), and then to resistivity(Eq.9.8,page10). But the document also said velocity due to temperature is magnitudes larger ...
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Is Time a Parameter in Relativistic Lagrangian Mechanics?
In a previous homework on the analysis of some relativistic Lagrangian, I got a comment that saying the Lagrangian was cyclic in time (or that time is a cyclic variable) because
$
\partial_t \mathcal{...
- 113
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Reflection coefficient: Acoustics vs Mechanics
I recently tried to derive the reflection coefficient $R$. This is not a complicated task, however after making some literature research I found two derivations which arrive at seemingly different ...
- 469
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Doppler shift phenomenon for non-inertia frames
The Doppler shift phenomenon is well understood when the source and observer are in relative constant motion. However, I'm curious to know how the Doppler shift phenomenon is modified when they (i.e., ...
- 342
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Is there an intrinsic energy-momentum associated with constraining forces that don't do work?
As an example, consider a continuous charge distribution, within Maxwell's model of classical electrodynamics, that is brought from infinity onto a spherical surface at a radius $r$ from the origin. ...
- 3,108
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How different is the induced magnetic field of a coil with a solid rod core and a sheet-wrapped one? (Assuming both use the same material)
I'm doing research for a university project and looking for commercial references for Mu metal, I found out that in my country at P2B (particular to business) level, sheets are significantly easier to ...
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