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> From: gaw-a
> To: Doore, Daniel [MIS]
> Subject: Re: New SAM Coupe technical manual
> Date: 28 October 1994 14:48
>
> On Oct 28, 2:27pm in "Re: New SAM Coupe technical manual", you warbled:
> ] All capacitors are measures in micro-farads, a single farad is an huge
>
> ^^
> (sic)
>
> ] amount of electrical charge, As I recall the definition of a farad is
the
> ] capacitance of a capacitor of which a potential of 1 volt is created by
> ] a charge of one coulomb. And since this is an SI unit, the plates would
> ] have to be 1 metre square, and 1 metre apart.
>
> Ummmm... I think you have that wrong. Sorry.
>
> 1m apart would give you nothing at all.
It was the 1m apart bit I was unsure of, the rest is OK though (I went to
the dictionary for that <grin> )
> As I remember, C obeys the inverse-square law up to a limit -- ie if you
> halve the distance between the plates, you quadruple C.
>
> ie C is prop. to A/(d^2) where A is the area of the plates.
No Idea, I can't remember.
>
> ] We are talking big.
>
> Well at least you're right there...
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This was the whole point I was trying to get across without all this physics
crap,
I didn't want to start arguing on a point that I am very rusty on.
Simple facts time:
farad = large.
capacitors capacitences are mere fractions of farads.
chances of getting 220 farad capacitor in anything but a
warehouse = small.
That was all I was trying to get across.
Jeez.
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> Sorry if all this is wrong, but it's nearly 3 years since i understood any
> electronics, and nearly 3 months since I actually _did_ any :) :) :) :)
It's been 3 years since I last did anything like that, and I didn't much
understand
it at the time either. Buggered on both fronts.
Dan.
> Cheers
>
> :) Geoff (:
>
>
