Negative! There is no current unless there is a conductor.
A conductor allows low-energy electrons to jump from atom
to atom.

CN


"Scout" wrote in message ...
but isn't Bob's point that the electron is moving, and in doing so must have
a path, and hence, by definition, is electrical current?
Scout

"Capt. Neal®" wrote in message
...
What a behind-the-times bunch of Putzes!

It has been proven electrons don't have an orbit. According to
quantum mechanics, electrons only have probability of filling those
areas around the core of an atom where the wave component of
the electron can exist without canceling itself out.

I hope this helps.

CN


"Scout" wrote in message
...
I see what you mean. Each electron orbit is a closed circuit.
Does emf play some role in propelling an electron through its orbit?
Scout

"Bob Crantz" wrote
The flux must cross a closed conductor (loop) for current to flow. But
that
is pertinent to a permanent magnet.

Atoms have magnetic fields from the electron orbits. The electron is in
motion around the nucleus in a closed path. The electron, through its
motion, is a current and generates a magnetic field. If enough atoms
are
in
correct alignemnt you have a net magnetic field.

"Scout" wrote in message
...
I thought the flux had to cross a conductor for current to flow.

"Bob Crantz" wrote in message
link.net...
A permanent magnet does have current flow.


"Scout" wrote in message
...
"JG" wrote in message
...
I believe the Swedes did a study that showed there were know ill
effects
on
people, but I would pass on it if it were overhead. I believe
their
study
was directly overhead. 200 feet probably wouldn't be an issue.
More
investigation is, of course, warranted.

Makes one wonder about the magic magnetic bracelets and bands
people
wear
for pain management. Why would magnetic flux be a miracle cure when
produced
by a permanent magnet but not when produced by current flow?
Scout

How about when a CRT fires electrons through a vacuum and onto phosphorus
coated screen, would you consider that to be current flowing without a
conductor?
Scout

"Capt. Neal®" wrote in message
...
Negative! There is no current unless there is a conductor.
A conductor allows low-energy electrons to jump from atom
to atom.

CN


"Scout" wrote in message
...
but isn't Bob's point that the electron is moving, and in doing so must
have
a path, and hence, by definition, is electrical current?
Scout

"Capt. Neal®" wrote in message
...
What a behind-the-times bunch of Putzes!

It has been proven electrons don't have an orbit. According to
quantum mechanics, electrons only have probability of filling those
areas around the core of an atom where the wave component of
the electron can exist without canceling itself out.

I hope this helps.

CN


"Scout" wrote in message
...
I see what you mean. Each electron orbit is a closed circuit.
Does emf play some role in propelling an electron through its orbit?
Scout

"Bob Crantz" wrote
The flux must cross a closed conductor (loop) for current to flow.
But
that
is pertinent to a permanent magnet.

Atoms have magnetic fields from the electron orbits. The electron is
in
motion around the nucleus in a closed path. The electron, through
its
motion, is a current and generates a magnetic field. If enough atoms
are
in
correct alignemnt you have a net magnetic field.

"Scout" wrote in message
...
I thought the flux had to cross a conductor for current to flow.

"Bob Crantz" wrote in message
link.net...
A permanent magnet does have current flow.


"Scout" wrote in message
...
"JG" wrote in message
...
I believe the Swedes did a study that showed there were know
ill
effects
on
people, but I would pass on it if it were overhead. I believe
their
study
was directly overhead. 200 feet probably wouldn't be an issue.
More
investigation is, of course, warranted.

Makes one wonder about the magic magnetic bracelets and bands
people
wear
for pain management. Why would magnetic flux be a miracle cure
when
produced
by a permanent magnet but not when produced by current flow?
Scout

Negative. There are large electromagnets that control the path of the electron on its
way to the phosphors on the viewing screen. There is no current only bare electrons
moving across a vacuum by magnetic forces to the phosphors. There is no conductor.
A conductor is usually a metal like a wire that is made of copper or silver or gold in
which the atoms have loosely bound electrons in the outer shell which can jump from
one atom to the next.

CN


"Scout" wrote in message ...
How about when a CRT fires electrons through a vacuum and onto phosphorus
coated screen, would you consider that to be current flowing without a
conductor?
Scout

"Capt. Neal®" wrote in message
...
Negative! There is no current unless there is a conductor.
A conductor allows low-energy electrons to jump from atom
to atom.

CN


"Scout" wrote in message
...
but isn't Bob's point that the electron is moving, and in doing so must
have
a path, and hence, by definition, is electrical current?
Scout

"Capt. Neal®" wrote in message
...
What a behind-the-times bunch of Putzes!

It has been proven electrons don't have an orbit. According to
quantum mechanics, electrons only have probability of filling those
areas around the core of an atom where the wave component of
the electron can exist without canceling itself out.

I hope this helps.

CN


"Scout" wrote in message
...
I see what you mean. Each electron orbit is a closed circuit.
Does emf play some role in propelling an electron through its orbit?
Scout

"Bob Crantz" wrote
The flux must cross a closed conductor (loop) for current to flow.
But
that
is pertinent to a permanent magnet.

Atoms have magnetic fields from the electron orbits. The electron is
in
motion around the nucleus in a closed path. The electron, through
its
motion, is a current and generates a magnetic field. If enough atoms
are
in
correct alignemnt you have a net magnetic field.

"Scout" wrote in message
...
I thought the flux had to cross a conductor for current to flow.

"Bob Crantz" wrote in message
link.net...
A permanent magnet does have current flow.


"Scout" wrote in message
...
"JG" wrote in message
...
I believe the Swedes did a study that showed there were know
ill
effects
on
people, but I would pass on it if it were overhead. I believe
their
study
was directly overhead. 200 feet probably wouldn't be an issue.
More
investigation is, of course, warranted.

Makes one wonder about the magic magnetic bracelets and bands
people
wear
for pain management. Why would magnetic flux be a miracle cure
when
produced
by a permanent magnet but not when produced by current flow?
Scout

You're sinking fast here, Neal. That "Physics for English Majors"
course you took gave you a few buzzwords, but no knowledge.

Capt. Neal® wrote:

Negative. There are large electromagnets that control the path of the electron on its
way to the phosphors on the viewing screen. There is no current only bare electrons
moving across a vacuum by magnetic forces to the phosphors. There is no conductor.
A conductor is usually a metal like a wire that is made of copper or silver or gold in
which the atoms have loosely bound electrons in the outer shell which can jump from
one atom to the next.

CN


"Scout" wrote in message ...

How about when a CRT fires electrons through a vacuum and onto phosphorus
coated screen, would you consider that to be current flowing without a
conductor?
Scout

"Capt. Neal®" wrote in message
...

Negative! There is no current unless there is a conductor.
A conductor allows low-energy electrons to jump from atom
to atom.

CN


"Scout" wrote in message
...

but isn't Bob's point that the electron is moving, and in doing so must
have
a path, and hence, by definition, is electrical current?
Scout

"Capt. Neal®" wrote in message
...

What a behind-the-times bunch of Putzes!

It has been proven electrons don't have an orbit. According to
quantum mechanics, electrons only have probability of filling those
areas around the core of an atom where the wave component of
the electron can exist without canceling itself out.

I hope this helps.

CN


"Scout" wrote in message
...

I see what you mean. Each electron orbit is a closed circuit.
Does emf play some role in propelling an electron through its orbit?
Scout

"Bob Crantz" wrote

The flux must cross a closed conductor (loop) for current to flow.
But
that
is pertinent to a permanent magnet.

Atoms have magnetic fields from the electron orbits. The electron is
in
motion around the nucleus in a closed path. The electron, through
its
motion, is a current and generates a magnetic field. If enough atoms
are
in
correct alignemnt you have a net magnetic field.

"Scout" wrote in message
...

I thought the flux had to cross a conductor for current to flow.

"Bob Crantz" wrote in message
as.earthlink.net...

A permanent magnet does have current flow.


"Scout" wrote in message
...

"JG" wrote in message
. ..

I believe the Swedes did a study that showed there were know
ill

effects

on

people, but I would pass on it if it were overhead. I believe
their
study
was directly overhead. 200 feet probably wouldn't be an issue.
More
investigation is, of course, warranted.

Makes one wonder about the magic magnetic bracelets and bands
people

wear

for pain management. Why would magnetic flux be a miracle cure
when

produced

by a permanent magnet but not when produced by current flow?
Scout

Capt. Neal® wrote:
Negative. There are large electromagnets that control the path of the
electron on its way to the phosphors on the viewing screen. There is no
current only bare electrons moving across a vacuum by magnetic forces
to the phosphors.

What's that called if it isn't current?


--
Wally
www.artbywally.com
www.wally.myby.co.uk

It's called controlled static electricity.

CN

"Wally" wrote in message ...
Capt. Neal® wrote:
Negative. There are large electromagnets that control the path of the
electron on its way to the phosphors on the viewing screen. There is no
current only bare electrons moving across a vacuum by magnetic forces
to the phosphors.

What's that called if it isn't current?


--
Wally
www.artbywally.com
www.wally.myby.co.uk

"Wally" wrote in message
...
Capt. Neal® wrote:
Negative. There are large electromagnets that control the path of the
electron on its way to the phosphors on the viewing screen. There is no
current only bare electrons moving across a vacuum by magnetic forces
to the phosphors.

What's that called if it isn't current?


--
Wally
www.artbywally.com
www.wally.myby.co.uk



It used to be referred to as "emission". Same thing occurs in vacuum tubes.
To further confuse, I recall the correct terminology as being "emission
current".

Eisboch

Eisboch wrote:

It used to be referred to as "emission". Same thing occurs in vacuum
tubes.

It's called 'thermionic emission', since it is the heating of the cathode
causes the electrons to be released from same. It should be noted, however,
that there is no need to create a directed flow from one electrode to
another for there to be emission (a hot soldering iron is a thermionic
emitter). Indeed, without an anode, the emitted electrons congregate within
the glass envelope and create what is called a 'space charge'. To accurately
describe the *transfer* of electrons from one electrode to another, the term
'emission' is insufficient.


To further confuse, I recall the correct terminology as being
"emission current".

I see no reason to be confused by referring to it as current. If one
connects an ammeter between the anode and the +HT supply, or between the
cathode and ground, one will read a current. If there is current at one side
of the valve, and current at the other, then surely there is current within
it? If the flow of electrons from cathode to anode is not current, then what
is it?


--
Wally
www.artbywally.com
www.wally.myby.co.uk

"Wally" wrote in message
...

I see no reason to be confused by referring to it as current. If one
connects an ammeter between the anode and the +HT supply, or between the
cathode and ground, one will read a current. If there is current at one
side
of the valve, and current at the other, then surely there is current
within
it? If the flow of electrons from cathode to anode is not current, then
what
is it?


--
Wally
www.artbywally.com
www.wally.myby.co.uk



I certainly agree. It is current. Same as in a vacuum sputter system,
although the current is supported by an ionized gas or plasma.

Which brings up another question. If a cathode is typically negative and an
anode is typically positive, and current flows from the cathode to anode in
a DC circuit, then who the heck upset my understanding half way through my
career and changed current flow from positive to negative?

Eisboch

Capt. Neal® wrote:

Negative! There is no current unless there is a conductor.
A conductor allows low-energy electrons to jump from atom
to atom.

How does a vacuum tube work, then? A vacuum isn't a conductor, right?


--
Wally
www.artbywally.com
www.wally.myby.co.uk