# Re: 60 vs. 30 ma

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From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Monday, June 30, 1997 3:02 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: 60 vs. 30 ma

HI Alfred, all,

> From:   Alfred A. Skrocki[SMTP:alfred.skrocki-at-cybernetworking-dot-com]
> Sent:   Thursday, June 26, 1997 2:21 PM
> To:     Tesla List
> Subject:    Re: 60 vs. 30 ma
>
> On Monday, June 23, 1997 3:11 PM Dan Engle
> [SMTP:DEngle-at-NJAOST.ML-dot-com] wrote;
>
> > I'm not trying to beat a dead-horse here, but I'm trying to see this in
> > layman's terms.  Feel free to correct me...  If you say that current is
> > the quantity of electrons(for example, the size of a river-i.e. the
> > bigger the more water) and voltage is the "pressure"(the speed),
>
> Pressure and speed are totally different and unrelated things!
>
> > then wouldn't increasing either basically charge the capacitor faster?
> > Wouldn't doubling the current(increasing the size of the river) or
> > increasing the voltage(increasing the flow of the water) have the same
> > effect?
>
> NO! Perhaps a different analogy will clarify things. Try thinking of
> electricity as a gas and the amount of gas is the current and the
> pressure of the gas is the voltage. Using this analogy a capacitor
> would be a storage tank. if you had 1000 cubic feet of gas in a
> container and connected it to a 1 cubic foot cylinder and the gas was
> under 1 atmosphere of pressure then the cylinder would hold 1 cubic
> feet of gas. You could have 100,000 cubic feet of gas connected to
> that same cylinder and it still will only hold 1 cubic feet of gas.
> BUT if you increase the pressure to say 10 atmospheres THEN you would
> be forcing more gas into the cylinder.

I think the water-in-the-pipe analogy is supposed to be an analogue
of resistance rather than electricity per se isn't it?

Malcolm

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