Joule Thief 101

[Magneticitist]

here's a more basic beef I have with it and why I consider it a paradox or as you say catch 22. I've been told I overthink things.

when I imagine infinite absolute current over absolute 0 resistance, the further away I move from this tiny 'window' of real world relation where math can approximate physical outcome, the more clear it becomes that 0 resistance, or ideal conductor, absolutely requires an ideal source. I figure that because how does one calculate the current across 0 resistance? we can calculate it across .00000000000000000001 resistance, but not 0. it doesn't exist at 0. I have a hard time seeing it any other way.


but thanks for trying anyway I guess.

[tinman]

here's a more basic beef I have with it and why I consider it a paradox or as you say catch 22. I've been told I overthink things.

when I imagine infinite absolute current over absolute 0 resistance, the further away I move from this tiny 'window' of real world relation where math can approximate physical outcome, the more clear it becomes that 0 resistance, or ideal conductor, absolutely requires an ideal source. I figure that because how does one calculate the current across 0 resistance? we can calculate it across .00000000000000000001 resistance, but not 0. it doesn't exist at 0. I have a hard time seeing it any other way.


but thanks for trying anyway I guess.

When there is no resistance,it becomes a dead short. A true dead short dose not restrict the flow of current in any way. An ideal voltage dose not change,regardless of the load--which is now an ideal dead short.

No point in running for the hill's,as they will be gone with the rest of the universe.

My theory in this situation is a reverse big bang,where all the energy that exist in the universe is consumed by the ideal voltage source device to maintain the ideal voltage across the ideal dead short. If the ideal dead short is not going to give,and the ideal voltage is not going to change,then it will continue until all the energy in the universe has been consumed,and now is stored in the ideal dead short mass--and so is the conservation of energy--not created,not destroyed ,but now stored.


Brad

[Magneticitist]

I can understand that we arbitrarily set a point where we say "ok.. that's close enough to max" when it comes to inductor charging. it's based upon a constant. using this 'constant' for all models, we can approximate inductor behavior over time given inductance..  but it's like asking your meter to give you the amp reading on a circuit with 0 resistance. it just can't be done because all of our figures are based off one another. even if we say 'OK', instead of 0 resistance, let's say .000000000001.. that's kind of like somehow thinking .000000000001 is anywhere close to 0. you cannot get 'close' to 0.
you cannot approximate 0.. The actual existence of 0 means we can divide up 0-1 an infinite number of times.

Any thoughts of a coil with 0 resistance acting like a coil with .000000000000000000000001 ohms resistance is utterly ridiculous because it has never been demonstrated how a coil with 0 ohms resistance acts, as of yet in our currently defined laws of conservation, right?

to me resistance is not just some factor we can remove from an equation altogether, and say the
result will be the same approximation as if there was "close to 0" resistance. this is a fallacy i cannot get around mentally.

[MileHigh]

A coil with no resistance and a coil with very low resistance will act in fundamentally the same manner.  We know absolutely and with 100% certainty how a coil with zero resistance acts.  That's what you need to believe instead of believing in superstition.  If only the log jam could be broken on the other thread and you guys could move forward and try to answer the question.

[Pirate88179]

A coil with no resistance and a coil with very low resistance will act in fundamentally the same manner.  We know absolutely and with 100% certainty how a coil with zero resistance acts.  That's what you need to believe instead of believing in superstition.  If only the log jam could be broken on the other thread and you guys could move forward and try to answer the question.

But, do we agree that a coil with 0 resistance does not/can not exist?  I hope that we do, otherwise, I am missing something major.

IF I am correct about this, then what good does "knowing" how a coil with 0 resistance will act do for us?

I am not arguing anything as this is not my field and I am here to learn.

Bill