Re: [TCML] final word on inductance

[Greg Leyh <lod@xxxxxxxxxxx>]

Dr. Resonance wrote:
> Thanks Paul.  That's what I've been trying to tell everyone.
>
[snip]
>
>>> >> > L= Volt second / Amps = Henry
>>> >> > ...
>>> >> > The bottom line is really (volt seconds/Amps) - - -
>>> >> > change either one and the inductance changes.
>>> >> >
>>> >> > Dr. Resonance
>>> >>
>>> >> Change either one (volts or current), and the other one changes
>>> >> by the same proportion, so the inductance remains constant.
>>> >>
>>> >> At low frequencies where self-capacitance can be ignored,
>>> >> inductance is a constant for the coil, based only on the
>>> >> geometry and is independent of frequency.  That's the
>>> >> inductance measured by an LCR meter and estimated by
>>> >> Wheeler, etc.
>>> >>
>>> >> At frequencies high enough for self capacitance to matter,
>>> >> the current may no longer be uniform in the coil and the
>>> >> 'effective' inductance is likely to be different from the DC
>>> >> value and will vary slowly with frequency.
>>> >>
>>> >> --
>>> >> Paul Nicholson
>>> >> --



It's obvious that Paul did not agree with you.  Your claim that 
inductance changes with current is the exact opposite of his claim that 
it remains constant.


Suggestion to the List:
The possibility for a rational discussion here is rapidly fading.  One 
person supports the claim that inductance changes with current, but 
offers no supporting evidence.  Unless anyone else cares to offer 
arguments supporting this claim, I suggest that we assume Faraday's Law 
is correct and that inductance is independent of current, as per 
standard physics textbooks and described by Paul's summary above.

-GL
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