All Questions
11 questions
0
votes
1
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47
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How does DC loses energy?
I am new to it, so please help. As I know, AC current is back and forth motion of electrons, which radiates electromagnetic waves, so there is energy radiation from power line to our home. But in case ...
0
votes
2
answers
112
views
Couldn't understand the reasoning on the propagation of the electromagnetic wave in the vacuum?
Since the solution of the wave function in vaccum gives two progressive plane waves $f(x-ct)+g(x+ct)$ depending on $x$ the direction of propagation, in the other side we have the $\operatorname{div}(...
0
votes
1
answer
94
views
How does electric field apply force on charges?
As far as I understand magnetic field applies force on charges or charged/ magnetic materials via the electromagnetic waves(or photons) emitted by moving electrons. And electric field also uses ...
- 1
0
votes
0
answers
41
views
Does altitude play a role in the strength of electric fields?
After many controlled trials, I can conclude that the same device - e.g. a monitor - will emit far higher electric fields upstairs than downstairs, from the same distance, and in environments that ...
1
vote
3
answers
2k
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Energy transfer with electromagnetic waves
As we know that the electrical energy is transferred via electromagnetic waves from the source to the load. My question is that, even if there is transfer of energy through the electromagnetic waves, ...
- 972
5
votes
6
answers
769
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Can electric field pass through a charge particle so that the charge particle behind the one can get energy?
Can an electric field pass through a charged particle? As the field is energetic it would get absorbed by charge as I think 🤔. Let assume that there are two electrons one behind the other such that ...
6
votes
1
answer
152
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What is causing the acceleration of charges in an ideal TEM transmission line?
As I understand, in an ideal TEM transmission line we can set up the telegrapher equations and solve to show that the line propagates voltage and current waves.
My confusion arises when we recognize ...
-5
votes
1
answer
109
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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{...
1
vote
1
answer
716
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Electric Field inside an ideal conductor
I have some doubts about the electric field inside an ideal conductor (let's call it E). Precisely, I have read two different descriptions
1) On physics books I read that the electric field inside in ...
- 1,329
6
votes
3
answers
2k
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Why doesn't electric field of an electromagnetic wave cause an electric shock?
An electromagnetic wave can have an electric field magnitude of more than 1000 V/m, which is a very high potential difference. When the light shines on you, why don't you feel an electric shock?
14
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7
answers
12k
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Why is electricity not transmitted wirelessly?
Why is electricity not transmitted wirelessly such that we don't need to span cables on the earth's surface? As in: electricity is transmitted wirelessly from the power plant to the household.
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