The bifilar pancake coil at its resonant frequency

[Jeg]

Thank you Tinsel, i added above that changing direction is not the right term. It is actually a break to the flaw. While it was increasing, then it suddenly decreased. The question is: For this very brief time interval where current changes from a max value to zero. Will the magnetic poles of the coil reverse or not?

[TinselKoala]

No, the coil tries its best to _resist_ changes in the magnetic field. Since the current does not reverse, neither does the polarity of the field produced by the coil.

Now, when a parallel capacitor is added to form a tank circuit, matters are different, as energy is transferred back and forth between the capacitor and the coil during the tank's "ringing".

[MileHigh]

I think what will help people is just to repeat what TK said about the coil changing from being something that is being energized by the battery and storing energy to something that is discharging energy into the LED load.

The flywheel analogy could be enlightening for some people also.  Voltage is equivalent to applying torque to the flywheel.  The voltage has two possible polarities and the torque has two possible directions.  Current is equivalent to the rotational speed of the flywheel. Current can flow in two possible directions and the speed of rotating flywheel can be in two possible directions.

So, what is the flywheel version of TK's simple circuit?

Imagine a large flywheel on a nice ball bearing mount with a smaller-diameter hand grip so a person can spin up the flywheel with their hands.  So in this example, a person applying torque to the flywheel with human muscle power is equivalent to the battery.  So, you spin up the flywheel with your hands for 10 seconds.  Then, you apply disk brakes to the flywheel until the flywheel stops rotating.  That's it.  The disk brakes are equivalent to the LED.  The disk brakes getting hot from friction is the equivalent to the LED emitting light and heat.

Notice that the flywheel always spins in the same direction.  i.e.; the current through the coil always flows in the same direction.

Simple as cake, a piece of pie.

Now, the fun begins.  Especially for our expanded-mind expanded-consciousness real thinkers that are not bound by the mundane limits of a mundane human imagination and existence.  I speak to the free thinkers that are not mere drones indoctrinated by the current mass brainwashing system that guides us through life like so many sheep.

We know that a flywheel is equivalent to a coil.  So what about RESONANCE, when a coil is resonating at its resonant frequency?  How does that relate to a flywheel?

i.e.; The brass pancake flywheel at its resonant frequency.  Mechanical self-resonance!

[Jeg]

No, the coil tries its best to _resist_ changes in the magnetic field. Since the current does not reverse, neither does the polarity of the field produced by the coil.

Now, when a parallel capacitor is added to form a tank circuit, matters are different, as energy is transferred back and forth between the capacitor and the coil during the tank's "ringing".

Yes capacitor is an other matter.

Cemf is reaction to change. It always follows magnetic polarity changes right? It always develops it self in a way so to oppose to magnetic field's changes. Now, when we see a change of cemf across our secondary from negatives to positives. Doesn't that imply that for this brief moment where current decreases to zero there was also a magnetic polarity change? If we would place a field sensor watching the flux. Won't we see a change in magnetic polarity when switch opens?  hmm i need a field sensor.   

[Zephir]

it added above that changing direction is not the right term

This is semantic discussion: the current within coil disconnected from circuit behaves like the driver, who realized, he is stirring too right. So he will turn the steering wheel to the left, he will therefore change direction but  he is still stirring to the right at the beginning of his action, just in gradually smaller degree. The important is, his reaction points to the opposite direction than before. In similar way, the collapsing magnetic field will induce the electromotive force of the opposite polarity than the existing current.

With respect to special behavior of bifilar pancake coil this discussion is completely off topic, with respect to overunity subject it's OT even more. We are visiting this forum because of overunity and if we would want to discuss classical physics phenomena, then there are may way more competent forums for it.

bunch of drivel about how someone should be banned because they don't agree with you

I don't care if someone is agreeing with me - but he should unconditionally agree with possible existence of overunity - or he has nothing to discuss about just in this very forum. If he still discusses and twaddles something, then he is naturally A) off-topic and even B) disruptive to the topic of this forum. Is it really so difficult to understand it? One of reasons why this forum goes to the hell is, because it's flooded with people who are openly hostile to the overunity subject and who systematically changing subject from it. Such a people should be banned from here one after another - or we will not move forward. Me and many others are still visiting this forum in an effort to find ways for overunity development - not for to convince the people about its existence. If I would want to fight with mainstream crackpots about it, then I've many other forums where to go.

Face it or not: this is forum about cats for cat lovers - not about dogs, elephants or even for enemies of cats.