On Jan 23, 11:13*am, "Tom Del Rosso"
wrote:
Nelson wrote:
On Sun, 22 Jan 2012 20:33:26 -0500, Tom Del Rosso wrote
(in article ):

Mark Zacharias wrote:

http://library.thinkquest.org/16497/intro/index.html

I don't like this much. *Defining voltage in terms of resistance.
It should be in terms of coulombs and joules.

"Voltage is represented by the letter E. The basic unit of measure
is volts or the letter V. One volt will push 1 amp of current
through 1 ohm of resistance. Resistance will be discussed in a
later section."

Do you really think it's necessary for someone trying to get started
in electronics as a hobby to to worry about such niceties? *Defining
voltage in terms of resistance or "pressure" is much more intuitive to
a neophyte.

Yes, I can say that it is harder to learn when you start by learning it
wrong.

If they want to talk about pressure then at least they can do it
conceptually instead of quantitatively, and it doesn't take a great effort
for them to make clear that they are using analogy. *When they take the
ass-backwards approach of defining voltage quantitatively in terms of
resistance then they are only making it necessary to unlearn all that and
start over from scratch some day.

Defining things backwards is not a mere detail.

Let people get a good working understanding of things before you drown
them with abstractions. Thank goodness when I first became interested
in electronics, no one sat me down and emphasized the difference
between the abvolt and the statvolt.