There are many equations to describe what happens whenever
it does happen, but why does the current flow in the first place?
I used to think that it was electrostatic pressure caused by all
the electrons being bunched up against each other and so
pushing them apart, but someone said to me recently, that
the electrons are merely being dragged along by the travelling
So, why does the current start flowing in the first place
(when there is no wave to drag them along)?
And why does it keep flowing?
Neglecting some detail, there is a potential difference between the one
side (the hot side) of the power source and the neutral side of the
circuit. This means that positive electric charge will be in a lower
energy state if it at the negative side. It is like a ball being more
stable at the bottom of a slope because it has less potential energy
Thus with a potential across an appliance, current will flow. EEs say
there is an electric field pushing current through the appliance. The
same is true of the connecting wires. There is some push of the current
through the wires to enable flow against the electrical resistance. This
is small compared the the push through the appliance where work is being
done whether it is heating or driving a motor.
To reiterate, Electric field pushes charge. You want to push it hard
where you want work to be done. Electrical push is potential difference
An old man would be better off never having been born.
Is a beam of protons or deuterons a flow of current even without an
electron in the vicinity?
Saying that electricity is a transfer of electrons has caused more
misconception than clarity over the years. The nature of the charge is
irrelevant. Charge is electricity. Flow of charge is electric current,
Sometimes pedantic accuracy is useful. Explaining electricity is one of
An old man would be better off never having been born.
God! God is very busy and very powerful. God makes the trees leave in
the Spring and at the same time creates stars billions of light years
away. God never finished creation and we are still in process. That
is what evolution is, God's tweaking us to completion. All the motors
and circuits are under his constant control, for without God's might
there would be no current flow whatsoever.
Additionally, God is infinite. God has always been and will always
be. There is no beginning of time and no end because time and space
Wait until you learn about what is in store for us. For all around us
is the secret of gravity. We will find that secret and then a new
world will be at our disposal. Yes, there are many more processes
that we have yet to discover. God has created them and they are there
just waiting for us to find them.
... < Palpable bollocks deleted > ...
You are quite wrong in your assumed assessment of me.
I completed an electronics degree over 20 years ago, and looking at
the shelf of textbooks I mused that if I didn't get around to reading them
again soon, I never would.
So, out of interest, I started reading them all again, and came to the
that there was a great deal left unsaid and unexplained, even at the degree
I also accept that despite my level of education, that I do not know
and in pursuit of the truth, am prepared to admit my limitations in order
to achieve intellectual satisfaction.
I perceive now, that at whatever level one studies electricity, from the age
11 years upwards, that one is presented with a series of paradigms, none
of which are complete, and all of which are misleading to some extent.
Even at the level of Maxwell's Equations, electric charge is presented as
function akin to mass, whereas the physicist might claim that the electron
not a point, but a wave function.
So, as a part of my extended revision, I awakened the paradigm of electrons
being bunched together against their mutual repulsive forces (the "packing
density" sneered at in another post by a further example of rampant
and the electric current (and I am definitely discussing electrons and not
ions) being caused by that pressure from the electric field.
However, in discussion with a fellow radio ham (for such am I also) he
that the current flow in a waveguide is not caused by the mutually repulsive
electric field between electrons, but that the electrons are carried along
influence of a travelling e-m field and that the original emf that set the
wave in motion
is no longer relevant.
Hence the question that I posed.
Perhaps I was in error in posing a question about elementary matters in
that was itself more redolent of the elementary school and so attracted
from one or two who should perhaps still be confined to the classrooms of
that elementary school? If so, then I apologise, but I'm still interested in
elementary mechanisms of electric current, but from a perspective of one who
has experience of much more in-depth paradigms.
I too completed my Mathematics degree many years ago. I used to think
Physics was a revelation of how God created this universe until I
learned that all laws of physics are mere approximations, and that is
a bout the best we can do. God did not used such rigid structures in
his design but allowed for a multitude of variables and yet the
processes still work for us and him. The more I learn about his
infinite power the more I realize that we with all our knowledge know
about as much as one grain of sand on a planet of beaches. Look out
onto the many stars at night and one begins to realize just how small
What makes current flow? GOD!
You would be better advised to seek the attention that you seek from
a psychiatrist and not from this group. It is not unheard of for young
children to have an imaginary friend, but to have such a belief in adulthood
is a very clear indication of mental illness.
Any person that cannot believe in God surely is suffering from
delusions placed in their head by a misconception that Man's knowledge
It is like thinking the sun rotates around the earth.
So I presume, you have seen an electron and know why current flows. I
presume you think cause and effect, and an end and beginning are part
of all processes.
I presume that your thinking is inside the box created by empiricists
and you simply cannot crawl out from under the weight of years of
rational concrete thinking.
You are programmed.
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