The bifilar pancake coil at its resonant frequency

[TinselKoala]

@Mags,

Eddy hysteresis. Worse in the bottle neck! I'm talking about the water flow through the bottle neck there, not the capacitor discharge. All comparisons are not exactly the same as the real thing.

Now you have completely stopped making any sense at all.

[TinselKoala]

If the resistor were absent of induction, the discharge from the cap through the resistor would begin delivering max current instantly, max current determined by V/R. The resistance determines the time of complete discharge, more resistance, longer time to 0V. If we shrink from left to right the time chart of the discharge through a very high resistance compared to the short time it would take through a very low resistance, the curve should look the same, with the bulk of the charge diminished more quickly closer to the beginning of the discharge and the rate of discharge gets smaller the closer the cap reaches 0v.

If there is some sort of delay, what is causing the delay you express?

Mags

You are exactly right. And synchro's "delay" is the result of his not understanding what he is talking about. It may be possible to arrange inductances and resistances to give some maximum rate of charge-discharge at some point other than the beginning of the cycles, but that is not what synchro claimed. His claim is very clear in his own words and ever since then he has been trying to weasel out of admitting he was wrong, by constructing strawmen and moving goalposts.

If he thinks he can demonstrate otherwise by arranging some particular RCL circuit and measuring it on a scope ... let him do it. But it won't correspond to what he said in the beginning about _capacitors_.

[TinselKoala]

I mean seriously. This isn't exactly Rocket Science.

Or maybe it is.     


Below see Charge-Discharge curves of a 10 uF electrolytic capacitor charging to and discharging from approx. 5 volts. First scopeshot is with no resistor, second scopeshot is with 100R resistor, third scopeshot is with 1k resistor.  Where is the "bottleneck"? Where are the points of fastest charge rate, fastest discharge rate in each case?

(Disregard the HW frequency counter, it is off for some reason. The first shot is at 200 Hz, second is at about 60 Hz, the third shot is at 10 Hz.)

[MileHigh]

Wow, I see they all look the same but the time base has changed.

Somebody told me that they are exponential functions, but the base is a special number.  Like it's not say a base of 10 like 10^x.  (10 to the power of x).  The base is this number "e" also known as Euler's number.

"e" = 2.7182818284590452353602874713527...

It's an irrational number and they have calculated it out to over a trillion digits.

The scope shots show a voltage waveform as an exponential function.  The slope of the voltage waveform is actually the current because we are looking at the voltage across a capacitor.  The current waveform is an exponential function also.  The slope of the current waveform is also an exponential function.  And the slope of that function is also an exponential function.  And the slope of the new function is also an exponential function.  In fact, it goes on forever.

It's a brain buster.

[Magluvin]

I mean seriously. This isn't exactly Rocket Science.

Or maybe it is.     


Below see Charge-Discharge curves of a 10 uF electrolytic capacitor charging to and discharging from approx. 5 volts. First scopeshot is with no resistor, second scopeshot is with 100R resistor, third scopeshot is with 1k resistor.  Where is the "bottleneck"? Where are the points of fastest charge rate, fastest discharge rate in each case?

(Disregard the HW frequency counter, it is off for some reason. The first shot is at 200 Hz, second is at about 60 Hz, the third shot is at 10 Hz.)

Maybe for the sake of argument can you zoom in on the line of discharge.  At some point it may look like a flat line due to time scale, and maybe at that point a csr would be needed to see actual current if voltage drop is not visible.

Just thinkin

Mags