Re: Creating a folder on the desktop
Re: Creating a folder on the desktop
- Subject: Re: Creating a folder on the desktop
- From: "J. Stewart" <email@hidden>
- Date: Wed, 7 Sep 2005 05:18:13 -0400
On 09/06/05 at -0300 Bill Briggs said this
> No kidding. When they decided the convention for the direction of flow of electric current there was a 50:50
>chance of getting it right. They got it wrong. After they came to understand something of atomic structure and
>figured out that the charge carriers were electrons, they learned that the charge carriers (or current) was going
>in the opposite direction. But after more than 100 years of literature having been written with the other
>convention, it was too late to change it. So we still teach that the current flows from positive to negative,
>when in truth, the movement of charged particles goes in the opposite direction. In some sense, it's not a big
>deal, but it does confuse the hell out of students for a while.
While I was in school for electronics (High School, US Navy, later college courses) I was never taught that "current" flowed in any direction other than negative to positive. I later learned that some engineering courses taught "hole flow" as opposed to "electron flow".
Assuming two neutrally charged atoms, a hole is created when an electron departs a shell of atom 1 for a shell of atom 2 creating one positively charged and one negatively charged ion. In the presence of an applied voltage the holes appear to move in a direction opposite that of the electrons hence "hole flow".
JBS
--
I don't know how I got over the hill without getting to the top. — Will Rogers
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Applescript-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden