View Single Post
  #5  
Old December 3rd 05, 04:57 AM posted to rec.photo.digital,rec.photo.digital.zlr
external usenet poster
 
Posts: n/a
Default Rant about the term "ZLR"



millereric wrote:

"Bryan Olson" wrote in message

snip

Electricity is the flow of electrons; strangely
that flow is from negative charge to positive.


Why does logic dictate that electrons move in the opposite direction? All
other thing being equal, wouldn't there be fewer electrons in the place from
which the electrons are coming than in the place to which they are going?
An East wind blows to the West, is that also problematic?

Logic doesn't dictate electron movement. Electrons do flow from
negative to positive, i.e. the negative terminal of a power source
supplies electrons that flow around the circuitry and return to the
positive terminal.

There are a number of ways to prove this; the easiest is to consider a
vacuum tube. The heated cathode is the supplier of electrons, and the
charge on the anode draws them across the vacuum (controlled by
intermediate electrodes called grids and/or screens). The cathode is
connected to the negative side of the power supply, and the anode to the
positive, so electrons flow from negative to positive.

Colin D.