All Questions
70
questions
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If I create a varying electric field and it will then create a varying magnetic field, so will it also create light? Will I see a light ray?
If there is an electric field which is changing in time, lets say I create one, then it should create a varying magnetic field. So that means that there is an electromagnetic field, and oscillating ...
0
votes
1
answer
49
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Is generation of electric/ magnetic field due to motion of charge frame dependent? [duplicate]
Was introduced to electrostatics today. So I do not have much idea about it and neither I have a strong background in physics. Just a highschool student
1
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1
answer
489
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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
0
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1
answer
85
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What implies that transverse EM fields satisfy Laplace's in TEM waves?
I am reading Pozar's Microwave engieering. When explaining the TEM waves (pag98 4th edition) he defines $\bar{e}(x, y)$ as the transverse electric field. He proves that $$\nabla_{t}^{2} \bar{e}(x, y)=...
- 71
1
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1
answer
52
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Does the addition of a static charge or magnetic field to an antenna affect the EM waves it's supposed to receive?
I read this:
Does laser beam (EM wave) affect magnet next to it?
But I distinctly remember the use of a magnetic field to alter the polarization of light. Doc Edgerton used this technique to create a ...
- 1,721
1
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1
answer
400
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Electromagnetic field potentials
Good afternoon for everyone. I have a question in attitude towards the electromagnetic potentials. There are two terms showing two forms of Maxwells equations for electrostatic potential and vector ...
- 13
1
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1
answer
273
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Do Electric fields really contain energy in them? [closed]
If we assume that energy was first absorbed by q1 and then released by it which then reaches q2 , the same as , electric field not being absorbable and somehow magically gives the energy to q2 and q1 ...
0
votes
1
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60
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Why is the magnetic field vector of light so weak compared to it’s electric field vector?
As this article describes,
https://physics.aps.org/story/v26/st13
The magnetic field vector of light is extremely weak. It seems odd to me why this has never been explained in my science curriculum, ...
- 477
0
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0
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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 ...
-1
votes
1
answer
22
views
How electric charges behave in different motion conditions?
Electric charge at constant velocity produces magnetic an electric field but the particle does not radiate. But, in accelerated motion the particle radiates. But light is also a radiation and the ...
1
vote
2
answers
273
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Can you create a standing electromagnetic wave without generating an electric field?
I know it is possible to create a "standing" electromagnetic wave by generating it in a space that is limited in size relative to the wave's wavelength in some way. Is there any way of ...
2
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3
answers
138
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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
0
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1
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203
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How can we use the electrostatic boundary conditions for electromagnetic waves?
The boundary conditions for an electromagnetic wave passing from one linear dielectric media to the other (both having no free charges or current) are taken as:
$$B_{\perp_1} -B_{\perp_2} =0$$
$${\...
- 2,000
-4
votes
1
answer
105
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Can I describe whole Electromagnetism only with electric field $\vec{E}$?
Is it possible to write all Maxwell's equations only in terms of $\vec{E}$ (without $\vec{B}$)? The common formulation of Electromagnetism is governed by the equations below:
The Lorentz Force: $$\vec{...
0
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2
answers
47
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Why is there an upper bound to the frequency at which an electronic device can be operated? [closed]
Why is there an upper bound to the frequency at which an electronic device can be operated? For example, the frequency of electricity that we receive at home is 60Hz (in the USA).
What will happen if ...
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