This is comedy gold. Some people just don't know when they've painted themselves into a corner.
I have corrected the typo - "velocity" - to "acceleration".
High gradient of signal (usually - high frequency, highest at crossing zero voltage) - high acceleration of electrons.
High gradient of signal (usually - high frequency, highest at crossing zero voltage) - high acceleration of electrons.
What "stuff"?Alex RA,
Where are you getting this stuff?
Jn
That the impedance (the resistance) of coil due to induction (read skin-effect==induction phenomena's particular case) rises with the frequency (with high gradient)?
I got it from textbook.
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Which unfortunately, is still inaccurate.
It is the current slew rate causing a magnetic flux rate of change. Something we call (in my line of work) b-dot... rate of change of magnetic field.
And it is the conductivity of the conductor which invokes faraday's law to cause the eddy currents which conspire to exclude current from the center and enhance it at the outer area.
You do understand I do this for a living, no? And deal with this both for normal wires as well as superconductors.
You also confuse skin effect with the inductance of a coil.
Inductance is defined by the relationship between the current passing through a system and the total magnetic energy stored in the system as a result of that current.
E = .5 * L* I^2.
What is also not well known is that a coil's inductance will drift down as frequency increases due to proximity effect. It causes the current centroids in the wire to pull inward to the center of the coil, thereby reducing the total field energy stored.
And still, electron velocities are much much slower than my 3D printers. They clock in at 75 mm/sec max, electron transport speeds at that level would fry normal conductors
Jn
It is the current slew rate causing a magnetic flux rate of change. Something we call (in my line of work) b-dot... rate of change of magnetic field.
And it is the conductivity of the conductor which invokes faraday's law to cause the eddy currents which conspire to exclude current from the center and enhance it at the outer area.
You do understand I do this for a living, no? And deal with this both for normal wires as well as superconductors.
You also confuse skin effect with the inductance of a coil.
Inductance is defined by the relationship between the current passing through a system and the total magnetic energy stored in the system as a result of that current.
E = .5 * L* I^2.
What is also not well known is that a coil's inductance will drift down as frequency increases due to proximity effect. It causes the current centroids in the wire to pull inward to the center of the coil, thereby reducing the total field energy stored.
And still, electron velocities are much much slower than my 3D printers. They clock in at 75 mm/sec max, electron transport speeds at that level would fry normal conductors
Jn
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Alex RA,
You didn't know that the velocity of electrons in normal conductors is in the mm/second range at high currents?
Where are you getting this stuff?
Skin effect is the redistribution of current density as a consequence of eddy current toroidal loops which add to the transport current at the surface and subtract at the center. The eddy toroidal loops are a consequence of rate of change of internal magnetic fields generated as a result of Faraday's law.
I truly recommend you find a good textbook, this stuff I learned back in '74.
Jn
I dont understand this your wording mess of physics. I have 3 patents on electronics and my articles are here and there in internet. My Linkedin profile is here.Which unfortunately, is still inaccurate.
It is the current slew rate causing a magnetic flux rate of change. Something we call (in my line of work) b-dot... rate of change of magnetic field.
And it is the conductivity of the conductor which invokes faraday's law to cause the eddy currents which conspire to exclude current from the center and enhance it at the outer area.
You do understand I do this for a living, no? And deal with this both for normal wires as well as superconductors.
Jn
Instead, You are an anonimous unknown person.
If you do not understand the descriptions I just provided, how can you possibly hope to sit at the big boy's table and argue things you do not fathom.
Don't get me wrong, I'm not calling you dumb or stupid, just pointing out where your understandings lack.
I have kept my posts as simple as possible so as to not overwhelm you with details beyond your learnings.
I have said many times, E/M theory and understandings are very under-represented in all degree programs. Physicists have a better grasp than most.
I am anonymous to you perhaps, but not to some others here.
Jn
Don't get me wrong, I'm not calling you dumb or stupid, just pointing out where your understandings lack.
I have kept my posts as simple as possible so as to not overwhelm you with details beyond your learnings.
I have said many times, E/M theory and understandings are very under-represented in all degree programs. Physicists have a better grasp than most.
I am anonymous to you perhaps, but not to some others here.
Jn
You clearly have problems expressing causality in physics. And you have problems expressing even the same physical phenomena: inductance and (the same!) Faradey's law. There is contradiction even in your two consecutive posts - about induction (and simply one of it's measure - the inductivity).If you do not understand the descriptions I just provided, how can you possibly hope to sit at the big boy's table and argue things you do not fathom.
Don't get me wrong, I'm not calling you dumb or stupid, just pointing out where your understandings lack.
I have kept my posts as simple as possible so as to not overwhelm you with details beyond your learnings.
I have said many times, E/M theory and understandings are very under-represented in all degree programs. Physicists have a better grasp than most.
I am anonymous to you perhaps, but not to some others here.
Jn
I can recommend to read good textbook or Wikipedia:
Inductance - Wikipedia
Faraday's law of induction - Wikipedia
Scottmoose,
I don't know how I could ever trust anything you post anymore.....the driver is on the wrong side of the car!!!!
He was on holiday. 😀 Admittedly, not a very successful one.
I was always laughing when visiting London, seeing the crosswalks with painted words telling pedestrians to look to the RIGHT!!! I mean, duh!
Thankfully, I as a stupid American, saw that. Multiple times it saved my life.. I assume it was idiots like me getting run over that prompted that signage.
I don't think I could ever get used to that. Bad enough driving a moped in Bermuda..
Jn
Believe me, it's hard enough to get most of the natives to look for the traffic in London. 😉 One of my favourite places (sans Covid-19), but 'intense' is the word.
With your quite limited knowledge of the basics it would be nice if you could treat the experts here with due respect instead of insulting them!You clearly have problems expressing causality in physics. And you have problems expressing even the same physical phenomena: inductance and (the same!) Faradey's law. There is contradiction even in your two consecutive posts - about induction (and simply one of it's measure - the inductivity).
I can recommend to read good textbook or Wikipedia:
Inductance - Wikipedia
Faraday's law of induction - Wikipedia

Your posts are amusing.You clearly have problems expressing causality in physics. And you have problems expressing even the same physical phenomena: inductance and (the same!) Faradey's law. There is contradiction even in your two consecutive posts - about induction (and simply one of it's measure - the inductivity).
I can recommend to read good textbook or Wikipedia:
Inductance - Wikipedia
Faraday's law of induction - Wikipedia
You can't express inductance in your own words, but have to google it?
I used to contribute to Wikipedia in the early days, found it kinda boring.
Inductance (again) is defined as the relationship between the energy stored in a system and the current through the system causing the magnetic field.
E = 1/2 L I^2
rearrange:
L = 2E/(I^2)
The voltage across an inductor is expressed as:
V = LdI/dt + I dL/dt. Most think only of the first term, the second becomes important when one delves deeper. Or when working with magnets that run in the 2 to 10 Tesla range, as the iron saturates big time, dropping the inductance. Speakers also suffer this as the VC runs to either side of the front plate, but that is yet to be considered adequately. Coils experience this as the b-dot causes proximity and reduction of inductance due to centroid pull in.
I've done this over 30 years now, so do not have to rely on a google search to try and uphold the conversation.
You really should be asking questions, not trying to diss others.
jn
You kidding me, no? This is a mess.Your posts are amusing.
You can't express inductance in your own words, but have to google it?
I used to contribute to Wikipedia in the early days, found it kinda boring.
Inductance (again) is defined as the relationship between the energy stored in a system and the current through the system causing the magnetic field.
...
You really should be asking questions, not trying to diss others.
Inductance IS NOT A "RELATIONSHIP". Inductance is a law to resist.
You clearly do not see a difference, your physics knowledge is very basic.
"In electromagnetism and electronics, inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. The flow of electric current creates a magnetic field around the conductor. The field strength depends on the magnitude of the current, and follows any changes in current. From Faraday's law of induction, any change in magnetic field through a circuit induces an electromotive force (EMF) (voltage) in the conductors, a process known as electromagnetic induction. This induced voltage created by the changing current has the effect of opposing the change in current." (Wiki)
Besides Faraday's law is slightly wider that just induction - I already metioned this earlier. In vacuum kinescope tube electronic beam is spreading (skin-effect) due to Faraday's law (read law=skin-effect), but there is no conductor there.
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Thats what JN said with 2 equations. Do you have troubke understanding English, or the math? From the way your embaressing your self it looks like both.
Alex RA,
You crack me up.
Inductance is the relationship between energy stored as a consequence of current through, I posted the equation.
If you want to check what I said for accuracy, just ask any physicist working on superconducting (or even normal conductor) accelerator magnets for high energy particle accelerators and colliders. Heck, even the physicists involved with synchrotron machines and magnetic antimatter confinement bottles, they know this stuff. And if they don't, they know who to call. (Well, ok...e-mail).
And I gotta tell ya, even though they are all world renowned, if they don't know something, they just ask. Unlike you, who is attempting to bluster your way out of a corner.
You have no idea how a particle beam works in a vacuum, either heavy ions or electron beams. Remember, a particle beam like an electron synchrotron machine, all the charges are same polarity, and like polarities repel. It gets worse when the beam width is measured in nanometers.
Why do you think most particle accelerators around the world use quads and sextuplets to focus the beams? It's called an alternate gradient synchrotron, and using those in conjunction with the dipoles keeps the beam tight and focused...a mathematical structure they refer to as a "lattice".
And now they are starting to mix an electron beam into an ion beam to cool the particles down even more, this all due to the desire to increase luminosity....the rate of collisions.
Jn
You crack me up.
Inductance is the relationship between energy stored as a consequence of current through, I posted the equation.
If you want to check what I said for accuracy, just ask any physicist working on superconducting (or even normal conductor) accelerator magnets for high energy particle accelerators and colliders. Heck, even the physicists involved with synchrotron machines and magnetic antimatter confinement bottles, they know this stuff. And if they don't, they know who to call. (Well, ok...e-mail).
And I gotta tell ya, even though they are all world renowned, if they don't know something, they just ask. Unlike you, who is attempting to bluster your way out of a corner.
You have no idea how a particle beam works in a vacuum, either heavy ions or electron beams. Remember, a particle beam like an electron synchrotron machine, all the charges are same polarity, and like polarities repel. It gets worse when the beam width is measured in nanometers.
Why do you think most particle accelerators around the world use quads and sextuplets to focus the beams? It's called an alternate gradient synchrotron, and using those in conjunction with the dipoles keeps the beam tight and focused...a mathematical structure they refer to as a "lattice".
And now they are starting to mix an electron beam into an ion beam to cool the particles down even more, this all due to the desire to increase luminosity....the rate of collisions.
Jn
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Ha-ha.If you do not understand the descriptions I just provided, how can you possibly hope to sit at the big boy's table and argue things you do not fathom.
Sorry, I dont have "big boys" table. But! I have "big girl" here. She is ... my mother. She is a school teacher.... on physics. To be precise, she is one of the best physics teacher (top 5) in my 300K town.
She is sitting right behind me. At this moment I am helping her to prepare Google classroom pages for tomorrow's online class.
Her photo (second at right) at school's site.
https://sch26.edu.vn.ua/uploads/tiger-1464682357.jpg
I was thinking an hour doubting whether I should bother her with this your mess (she is not young, blood pressure you know).
Now I decided to ask her, translating some of your sentenses. She is ... just laughing at you and your accusation of Faradey, induction as a "relatioship" and skin-effect etc.
Sorry, no more physics here with you.
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It is nice you assist your mother, kudos to you, well done. And, this online stuff, I cannot wait until this pandemic is over. Despite best efforts, I do believe in person is best. That is what I see as a shortcoming on the internet/forum venue btw.. it is too easy to misjudge others, by words or by language.
I recommend you remove personal content from the web, either you do it or ask a moderator.
As to physics, I work with the premier physicists on this planet.
If your mother wishes to get the straight story, perhaps she should contact me.... I am sure your telling of the story (if you actually did) is probably rather incorrect (or incomplete).
Jn
I recommend you remove personal content from the web, either you do it or ask a moderator.
As to physics, I work with the premier physicists on this planet.
If your mother wishes to get the straight story, perhaps she should contact me.... I am sure your telling of the story (if you actually did) is probably rather incorrect (or incomplete).
Jn
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I dont understand this your wording mess of physics. I have 3 patents.
Does that make anyone with more than 3 patents cleverer than you?
Word in your ear. You are making yourself look a fool here. You are now pulling your mother into this as well.
Sorry, no more physics here with you.
Ah, the tried and trusted 'I'm not going to discuss it with you any more' rears its inevitable head once again. 😀
It's time for the horse:
Attachments
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JN,
You are citing the wrong experts. Fortunately I have Becks sort of on one side and Yochelsons on the other. (For humor google the names, first name I don't think will be needed, but use Aaron Beck and Sam or Leon Yochelson.)
Sam's work may actually be applicable here, to a slightly lesser extent!
You are citing the wrong experts. Fortunately I have Becks sort of on one side and Yochelsons on the other. (For humor google the names, first name I don't think will be needed, but use Aaron Beck and Sam or Leon Yochelson.)
Sam's work may actually be applicable here, to a slightly lesser extent!
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