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Author Topic: Magnet Myths and Misconceptions  (Read 605758 times)

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1080 on: January 14, 2015, 09:14:26 AM »
You have shamed yourself.  Contrary to your claims, the current function versus time is easily determined.  It does not depend on the inductor package or any of the other red herrings that you threw out.  It depends on the integral of V/L dt as MH posted.

MarkE Shame is on MileHigh's plate, I carry not a single bit of shame!

I answered the question, the answer I gave was correct for the question! No matter how much Crap Spouts from your Blow Hole!

MileHish is wrong and you also will not admit to the equation you posted being an approximation!

This puts you and mileHigh in the Lunatic Basket! Clinically!

Anyone here can already see this, even well before I came along!






Wow you, MileHigh and TinselKoala have made some enemy's here in this forum!






I have four, including BillyGoats Gruff - But I don't mind him because he is just simple and follows the leader, which he thinks is you and mileHigh.

 

You know, for an ex-hacker, youre not bad at getting to information quickly! Is it Wikkipedia or do you have a SQLDB setup for the quick ones?

Doesn't make you smart though! Again you lack all native intelligence! A balloon holds Hot Air too!

NoBull

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Re: Magnet Myths and Misconceptions
« Reply #1081 on: January 14, 2015, 09:42:09 AM »
MileHish is wrong and you also will not admit to the equation you posted being an approximation!
It is not an approximation for an ideal lumped circuit.

Even if you could not evaluate an integral, at least writing that the current increases linearly at a higher rate between 0-5s and a linearly but at a lower rate after 5s would be an indication that you understand something about this problem.

Your attempt to apply a frequency domain AC technique such as the "inductive reactance" to a transient state problem in a time domain, is an indication that you don't have a clue about basic electronics.

Complaining about the zero resistance in an Ohm's law relation misapplied to this problem, is another indication.




EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1082 on: January 14, 2015, 09:51:19 AM »
It is not an approximation for an ideal lumped circuit.

Even if you could not evaluate an integral, at least writing that the current increases linearly at a higher rate between 0-5s and a linearly but at a lower rate after 5s would be an indication that you understand something about this problem.

Your attempt to apply frequency domain AC technique such as the "inductive reactance" to a transient state in a time domain, is an indication that you don't have a clue about basic electronics.

NoBull - Just in case you have NOT READ ths Posts:

Ask away, My electronics is OK, my Magnetics is much better.


You have shown the very same rediculious behaviour of a child - Grow Up you FOOLISH Idiot!

I made no claims here you stupid FOOL

To imply "you don't have a clue about basic electronics" because I could not give the desired answer a question that was changed half way through the test, after already admitting I am Ok in Electronics does nothing but prove to everyone here that YOU NoBull are an Idiot!

A Stupid Foolish Idiot that cant use any common-sense!

Again, this proves nothing, you as mileHigh and MarkE  have proved, is just a bunch of non-sense that fills the mind of morons.

I cant believe your Babbyish behaviour! You Child!

MarkE

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Re: Magnet Myths and Misconceptions
« Reply #1083 on: January 14, 2015, 09:56:12 AM »
MarkE Shame is on MileHigh's plate, I carry not a single bit of shame!
Then you make yourself a poster child for the Dunning-Kruger effect.  Until the trivial any college EE student could easily derive answer was spoon fed to you, you offered lots of red herrings:  going off on frequency domain parameters in this time domain problem, talking about inductor package size etc.  Any claims you now make to supposedly having understood the problem fall flat.
Quote

I answered the question, the answer I gave was correct for the question! No matter how much Crap Spouts from your Blow Hole!
No your answers were all fails. 
Quote

MileHish is wrong and you also will not admit to the equation you posted being an approximation!
MH stipulated an ideal inductor in a circuit with no resistance and a perfect voltage source.  If you are going to try and suggest that we consider propagation effects on a 2H coil it is a distinction without difference.
Quote

This puts you and mileHigh in the Lunatic Basket! Clinically!
I see you want to play a clown again.  As you wish.
Quote

Anyone here can already see this, even well before I came along!






Wow you, MileHigh and TinselKoala have made some enemy's here in this forum!






I have four, including BillyGoats Gruff - But I don't mind him because he is just simple and follows the leader, which he thinks is you and mileHigh.

 

You know, for an ex-hacker, youre not bad at getting to information quickly! Is it Wikkipedia or do you have a SQLDB setup for the quick ones?

Doesn't make you smart though! Again you lack all native intelligence! A balloon holds Hot Air too!
That kind of response is just sad.  Why do you do such things to yourself?

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1084 on: January 14, 2015, 09:59:55 AM »
Then you make yourself a poster child for the Dunning-Kruger effect.  Until the trivial any college EE student could easily derive answer was spoon fed to you, you offered lots of red herrings:  going off on frequency domain parameters in this time domain problem, talking about inductor package size etc.  Any claims you now make to supposedly having understood the problem fall flat.No your answers were all fails.  MH stipulated an ideal inductor in a circuit with no resistance and a perfect voltage source.  If you are going to try and suggest that we consider propagation effects on a 2H coil it is a distinction without difference.I see you want to play a clown again.  As you wish.That kind of response is just sad.  Why do you do such things to yourself?

Only Clown in the Room is MarkE, with his jester and best friend MileHigh, with the friendly little kitten NoBull

Seriously, you are idiots!

Oil Company Troll Idiots!

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1085 on: January 14, 2015, 10:20:50 AM »
Milehigh Failed miserably at a Litmus test question to see if he knew what he was talking about.

The question:
Why is it that the Speed of Light is not the Constant used in Coax, and only 62%?

Then brilliance, he agrees with the question:

It's because the impedance of the medium (inside the coax) is not the same as the impedance of free space.

I re-defined the question:

But why, other copper cables are 89%

Then a display of Ignorance and more Assumptions:

Copper cables are not coaxial cables.  Every setup will have it's characteristic impedance and the formula for the speed is something like the square root of the permittivity divided by the permeability.   That's probably wrong but it is in the ballpark.  I would have to go look it up but I am not going to bother.  It's all part of transmission line theory.

So I give some rope:

Ok, so here you prove my point again. Look we cant all know everything all the time. I am not going to nail you to the wall on this! Because really I don't care if you don't know the real reason why.

Still, your demand is a ridiculous one and proves nothing! It is not constructive and helps no-one!

Then MarkE come in and saves MileHigh's ass:

In a lossless transmission line the propagation velocity is:  c/(uR*eR)0.5.  Most of the time in cables and etch inside printed wiring boards, uR is close to 1.0 and it is the eR that sets the velocity.  Typical printed circuit boards have eR values of 4-5 so the velocity is half or less of c inside the board.  The speed actually varies depending on how much of the fiberglass is glass and how much is resin.  At the ferocious data rates that we have today that can be a big problem because how traces line up with the glass bundles changes their timing.  In a coaxial cable that uses very low density PTFE foam the average eR is only about  1.5 and the velocity is about 0.8 c.  Higher density of PTFE increases the eR and further reduces the propagation velocity.  Traces that run on the top side of the circuit board send some of the energy through air above the trace and other energy through the board material underneath the trace.  These components run at different speeds and that distorts the signals.  But what can really drive fast signals batty is the protective nickel plating that is often applied between outside traces and gold top finish.  Nickel has a high uR.

I give MarkE the answer:

Ok, not bad MarkE. We can markE this as an answer because its close enough to what I was looking for.

See My point MileHigh!

So my point here is, these three people are playing tag team games with others here. Games that only an organised bunch of oil Company Trolls would have the tendency to play! These people are dangerous, lunatics!

Good at distorting truth, common-sense, direction and thoughts of others that do not stand up to these morons!

Truth will prevail and these idiots will be seen to be the morons they are!



MarkE

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Re: Magnet Myths and Misconceptions
« Reply #1086 on: January 14, 2015, 10:29:44 AM »
Only Clown in the Room is MarkE, with his jester and best friend MileHigh, with the friendly little kitten NoBull

Seriously, you are idiots!

Oil Company Troll Idiots!
This is really sad.  Who do you hope to impress with such childish antics?

MarkE

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Re: Magnet Myths and Misconceptions
« Reply #1087 on: January 14, 2015, 10:32:23 AM »
Milehigh Failed miserable at a Litmus test question to see if he knew what he was talking about.

The question:
Then brilliance, he agrees with the question:

I re-defined the question:

Then a display of Ignorance and more Assumptions:

So I give some rope:

Then MarkE come in and saves MileHigh's ass:

I give MarkE the answer:

So my point here is, these three people are playing tag team games with others here. Games that only an organised bunch of oil Company Trolls would have the tendency to play! These people are dangerous, lunatics!

Good at distorting truth, common-sense, direction and thoughts of others that do not stand up to these morons!

Truth will prevail and these idiots will be seen to be the morons they are!
That's more sad behavior.  Truly, who do you think posts like that favorably impress?

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1088 on: January 14, 2015, 10:39:21 AM »
This is really sad.  Who do you hope to impress with such childish antics?

You MarkE, like MileHogh, NoBull, TinselKoala display nothing but juvenile behaviour!

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1089 on: January 14, 2015, 10:40:39 AM »
That's more sad behavior.  Truly, who do you think posts like that favorably impress?

Don't like truth MarkE? Cant handle the Truth?

MarkE

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Re: Magnet Myths and Misconceptions
« Reply #1090 on: January 14, 2015, 10:54:47 AM »
Don't like truth MarkE? Cant handle the Truth?
Are you determined to convert your already sad behavior to pathetic? Who do you think your audience is?  Who do you think you can convince to take you the least bit seriously? 

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1091 on: January 14, 2015, 10:58:17 AM »
Are you determined to convert your already sad behavior to pathetic? Who do you think your audience is?  Who do you think you can convince to take you the least bit seriously?

only showing others your real intent MarkE, showing what your motivations are! why you like MileHogh are bent on shooting down others with your pathetic ramblings that often have no bearing at the topic at hand!

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1092 on: January 14, 2015, 11:12:00 AM »
Are you determined to convert your already sad behavior to pathetic? Who do you think your audience is?  Who do you think you can convince to take you the least bit seriously?

Admit it MarkE - your equation is only an approximation! Admit it! be honest here!

MarkE

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Re: Magnet Myths and Misconceptions
« Reply #1093 on: January 14, 2015, 11:14:22 AM »
only showing others your real intent MarkE, showing what your motivations are! why you like MileHogh are bent on shooting down others with your pathetic ramblings that often have no bearing at the topic at hand!
You can play this role you've chosen for yourself as long as you like.  It speaks for itself. 

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #1094 on: January 14, 2015, 11:25:11 AM »
You can play this role you've chosen for yourself as long as you like.  It speaks for itself.

More MarkE denial!