"Szczepan Bialek" wrote in message
.. .
Here you a
"". In electronic circuit theory, a "ground" is usually idealized as an
infinite source or sink for charge, which can absorb an unlimited amount
of
current without changing its potential. Where a real ground connection has
a
significant resistance, the approximation of zero potential is no longer
valid. Stray voltages or earth potential rise effects will occur, which
may
create noise in signals or if large enough will produce an electric shock
hazard.
The use of the term ground (or earth) is so common in electrical and
electronics applications that circuits in portable electronic devices such
as cell phones and media players as well as circuits in vehicles such as
ships, aircraft, and spacecraft may be spoken of as having a "ground"
connection without any actual connection to the Earth. This is usually a
large conductor attached to one side of the power supply (such as the
"ground plane" on a printed circuit board) which serves as the common
return
path for current from many different components in the circuit." From:
http://en.wikipedia.org/wiki/Ground_(electricity)

S*

Hello again folks.

{I am concerned about Szczepan. He's cut-and-pasting from Wikipedia. Is he
safe with a sharp pair of scissors?}
I'm not sure whether to suggest that he also look at "chassis" and "common
point".
More seriously, I guess this is an example of a common word, "ground",
having more than one technical meaning and this bringing confusion to the
lay person.

I really wish that Szczepan would get hold of a training manual for the
amateur radio licence exams. The usual diagrams would enlighten him.

Kindest regards from a wet UK, Ian.