All Questions
23
questions with no upvoted or accepted answers
3
votes
0
answers
162
views
Is frictional heat just electromagnetic interactions creating infrared radiation?
Example: Rub your index finger on a sheet of paper and you will feel that it will get noticeably hotter
Is the reason you feel this increase in heat (technically an increase in kinetic energy of the ...
- 283
2
votes
3
answers
138
views
Radiations in static fields by poynting Vector
Why is the Poynting vector $\vec S=\frac{1}{\mu_0}(\vec E\times \vec B)$ not able to produce radiation when fields are static?
- 193
2
votes
0
answers
70
views
A travelling field; Feynman lectures on Physics Volume 2
In Feynman's Lectures on Physics, volume 2, Chapter 18 (18-5), we look at the creation of a electromagnetic field, due to a moving infinite sheet of charge,
By looking at the Maxwell equations ...
- 455
1
vote
0
answers
38
views
Electromagnetic influences in electric field
Let us imagine a charge $q$ in space. At each point in space,there is an electric field vector associated with it. Now we start moving the charge in a direction. We know that electromagnetic ...
- 1,179
1
vote
0
answers
84
views
Why are not kinks produced for constant speed charge?
Why arent kinks produced when the charge moves at constant velocity in the same linear direction ?
I am asking this because this is the backbone of why EM wave is not created for constant velocity ...
- 525
1
vote
1
answer
489
views
Measure Earth Magnetic Field using Hall Effect
This is about Hall Effect from this youtube video at here. The voltage across a metal will change based on the strength of the magnetic field. I am wondering whether this will be accurate in reading ...
- 11
1
vote
0
answers
34
views
creating a varying electric field across a copper strip
Hi I am trying to create a varying electric field (by position on copper strip) across a copper strip by attempting a standing wave pattern. the following is a diagram
may I have some guidance on how ...
- 111
1
vote
0
answers
230
views
Retarded Coulomb's law and EM waves; Feynman texts
In this chapter, Feynman writes down the retarded Coulomb's law,
$$\begin{equation}
\label{Eq:II:21:1}
\mathbf E=\frac{q}{4\pi\epsilon_0}\biggl[
\frac{\mathbf e_{r'}}{r'^2}+\frac{r'}{c}\,\frac{d}{dt}\...
- 455
1
vote
0
answers
126
views
Why is electric dipole moment represented by "p"?
I recently came across a text where the electric dipole moment was represented as "d" instead of the more commonly used "p". The reason behind using "d" here is probably that "dipole moment" begins ...
- 21
1
vote
1
answer
90
views
Name of electric force
during a lab experiment, i noticed that a metal ball has a much harder time rolling on metal rails when their is a current passing through it and the rails. I was wondering why and if there was a name ...
- 1,473
1
vote
0
answers
178
views
Curie's principle in electromagnetic field theory
I am looking for some explanation and if possible also some references about the applications of Curie's principle in electromagnetic field Theory, precisely in the computation of magnetic (resp. ...
- 11
0
votes
0
answers
42
views
Does a charge moving in the direction of electric field produce EM wave?
I am a 12th grade student and our teacher told us that a accelerated charge particle produce EM wave .So a charge particle moving in the direction of electric field or a charge particle moving in a ...
0
votes
0
answers
66
views
Can electron remain still?
Imagine we have a hollow metallic toroid, with copper wire winded around it, which carries electric current. That implies we have magnetic field inside the hollow toroid. The toroid has vacuum inside. ...
0
votes
2
answers
92
views
Isolated Electric and Magnetic fields
From what I know, wherever there is an electric field that is propagating, there will be a magnetic field present too, because that's what an EM wave comprises of- if it is going to carry energy, we ...
- 167
0
votes
0
answers
654
views
Problem-solving books on electrodynamics
What are the best books on the problem-solving of classical electrodynamics exercises?
I looking for books that help me to solve Jackson and Griffiths exercises, i.e. books on the problem-solving of ...