All Questions
Tagged with electricity electromagnetic-radiation
68
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Confusion about EM waves in a conductor, AC in wires, and skin effect
I am trying to get my head around these different points:
From Maxwell's equations we find that an electromagnetic wave in a conductor decays in amplitude with a characteristic length of about 1 cm in ...
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1
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(A10) If light is an EM wave, can it interfere with electrons in a live wire, leading to a change in the wire's current?
Here's my question: If light is an electro-magnetic wave, with oscillating magnetic and electric fields, wouldn't light interfere with the free electrons flowing (slowly) in a wire, as the electric ...
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Passing electricity through magnets [duplicate]
Looking to link up with someone who has experience with electricity and magnets. I’m wondering if you can pass electricity through magnets similar to a wire.
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If light is made up of electromagnetic waves, then if I put a magnetic close to a laser beam, shouldn't the light bend? [duplicate]
Light always moves in a straight line unless gravity acts on it strongly, but since it is made of electric and magnetic waves, shouldn't it be pulled towards different charges and magnetic, or is ...
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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 ...
2
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1
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What is the microscopic physics of DC voltage propagation?
When a battery is connected to a circuit the voltage appears to the circuit as half a pulse and is propagated as an em wave, as any other pulse would be. This em generation must be the result of ...
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In a van de Graaf generator, when a spark happens, is an electromagnetic wave produced? If yes, in which direction?
In a van de Graaf generator, when a spark happens, electrons moves from one globe to the other globe.
Is an electromagnetic wave produced?
If an electromagnetic wave is produced, why is it produced?
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2
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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}(...
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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 ...
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4
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3
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300
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Why do we use wires/conductors to transport energy?
I am currently studying Maxwell equations and I learned that copper wires are essentially just wave guides for EM waves. Why do we not use an insulator to guide the wave and transport the energy which ...
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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 ...
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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, ...
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Current produced by EM wave in circuit
I have a specific question regarding the current produced by an EM wave interacting with a simple square circuit with constant resistance $R$. Let's say the EM wave can be explained by the simple ...
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Is it okay to sleep with the wifi router next to me? [closed]
Where I sleep I have my wifi router right above me. I don't know if this is safe for my health since it emits radiation.
Some people say that it should be safe since the radiation emitted is non-...
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Is EM radiation released when metals, that have free electrons, are accelerated? [duplicate]
I have read that charged particles, when accelerated, emit Electromagnetic Radiation. This was the basis for rejection of the Rutherford's atomic model. But is this statement complete?
Metals have ...
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