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On 2 Apr 2008 13:59:32 -0500, Jim Henderson <nos### [at] nospam com> wrote:
>
>Yes. Now just looking for an ESR reference. ;-)
Hay! Man! = Electron Spin Resonance :)
--
Regards
Stephen
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Stephen wrote:
> On 2 Apr 2008 13:59:32 -0500, Jim Henderson <nos### [at] nospamcom> wrote:
>
>> Yes. Now just looking for an ESR reference. ;-)
>
> Hay! Man! = Electron Spin Resonance :)
C'mon someone. Ask who esr is :-)
John
--
I will be brief but not nearly so brief as Salvador Dali, who gave the
world's shortest speech. He said, "I will be so brief I am already
finished," then he sat down.
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On Wed, 02 Apr 2008 20:28:16 +0100, Doctor John wrote:
> Stephen wrote:
>> On 2 Apr 2008 13:59:32 -0500, Jim Henderson <nos### [at] nospamcom> wrote:
>>
>>> Yes. Now just looking for an ESR reference. ;-)
>>
>> Hay! Man! = Electron Spin Resonance :)
> C'mon someone. Ask who esr is :-)
I'm just waiting. And of course it should've been "esr" not "ESR"....
Jim
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On Wed, 02 Apr 2008 20:28:16 +0100, Doctor John <doc### [at] gmailcom>
wrote:
>Stephen wrote:
>> On 2 Apr 2008 13:59:32 -0500, Jim Henderson <nos### [at] nospamcom> wrote:
>>
>>> Yes. Now just looking for an ESR reference. ;-)
>>
>> Hay! Man! = Electron Spin Resonance :)
>C'mon someone. Ask who esr is :-)
>
I wouldn't make an ers of myself :) [regional joke]
--
Regards
Stephen
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On Wed, 02 Apr 2008 20:33:45 +0100, Stephen wrote:
> On Wed, 02 Apr 2008 20:28:16 +0100, Doctor John <doc### [at] gmailcom>
> wrote:
>
>>Stephen wrote:
>>> On 2 Apr 2008 13:59:32 -0500, Jim Henderson <nos### [at] nospamcom> wrote:
>>>
>>>> Yes. Now just looking for an ESR reference. ;-)
>>>
>>> Hay! Man! = Electron Spin Resonance :)
>>C'mon someone. Ask who esr is :-)
>>
> I wouldn't make an ers of myself :) [regional joke]
Do you keep your ers in a jar? ;-)
Jim
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On 2 Apr 2008 15:41:48 -0500, Jim Henderson <nos### [at] nospamcom> wrote:
>
>Do you keep your ers in a jar? ;-)
No, but I have an uncle who keeps his parts in a biscuit tin.
We don't talk about him tho
He's F'n crackers :)
--
Regards
Stephen
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Invisible wrote:
> scott wrote:
>
>> A 9V source has an internal resistance, which will initially take all
>> the voltage as the capacitor draws a huge amount of current (even if
>> it doesn't, the wires will have some resistance). So across the
>> capacitor terminals will be a very low voltage, but a very high
>> current through it. Once the capacitor is fully charged, there will
>> be no current flowing, and so no voltage drop across the internal
>> resistance, and then the full 9 V across the capacitor.
>>
>> So you see, in this simple case, voltage across the capacitor is
>> definitely not proportional to current flowing through it. Quite the
>> opposite to a resistor.
>
> Right. So the potential difference between the terminals of a battery is
> 9 V, unless there happens to be a capacitor connected to them, in which
> case the potential difference is magically 0 V despite the fact that a
> vast current is being generated?
...
Remember that ideal components does NOT exist.
You might want to read about resistance of conductors, internal
resistance of voltage sources and equivalent series resistance (ESR)
of capacitors:
http://en.wikipedia.org/wiki/Electrical_resistance#Resistance_of_a_conductor
http://en.wikipedia.org/wiki/Voltage_source
http://en.wikipedia.org/wiki/Internal_resistance
http://en.wikipedia.org/wiki/Equivalent_series_resistance
--
Tor Olav
http://subcube.com
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> Interesting. I've never seen any car where turning the ignition *doesn't*
> disable all the other electrics in the system [including the headlights].
Try to find a car without just a simple radio, one that does other stuff
like sat nav etc. I guess the computer and GPS system etc doesn't respond
well to being switched on for 2 seconds, the turned off for 1 second while
the engine starts, then being switched back on again.
> As I understand it, turning the starter motor requires a massive amount of
> current, and is essentially the *only* reason a car has such a whopping
> great battery in the first place.
Yup.
> (Certainly it's not necessary just to run the spark plugs... or even the
> headlights...)
Of course, once your car engine is running you don't need a battery at all,
that's why racing cars don't have them to save weight.
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On Wed, 02 Apr 2008 21:47:59 +0100, Stephen wrote:
> On 2 Apr 2008 15:41:48 -0500, Jim Henderson <nos### [at] nospamcom> wrote:
>
>
>>Do you keep your ers in a jar? ;-)
>
> No, but I have an uncle who keeps his parts in a biscuit tin. We don't
> talk about him tho
> He's F'n crackers :)
LOL!
Jim
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"scott" <sco### [at] laptopcom> wrote in message
news:47f368da$1@news.povray.org...
>> I thought the voltage of a battery only decreases if you try to draw
>> current faster than the chemical processes inside the battery can restore
>> it? (I.e., it's a flaw parculiar to chemical batteries.)
>
> No, it decreases the instant start to draw any current. Maybe trying to
> teach you about complex AC circuit theory and power electronics was a bad
> starting point :-)
Believe it or not, I went to college to study electrical engineering - a
big no-go for me, shouldn't have done it. I don't think I did 8 months
before leaving a looong course, and I still learnt zilch. Ah, the youth of
yesterday... :o/
~Steve~
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