Any comments?Current requires electrical charges to move, not neccessarily electrons" so is that correct. As an example. The current flow in the human body is due to ion flow, not electrons.
John
Any comments?Current requires electrical charges to move, not neccessarily electrons" so is that correct. As an example. The current flow in the human body is due to ion flow, not electrons.
The problem I have with this statement is the atoms of water are bound down in ice, nothing can move. Since ions tend to be the molecules this seems contradictory.In metallic solids, electricity flows by means of electrons, from higher to lower electrical potential. In other media, any stream of charged objects may constitute an electric current. So when there is higher cross sectional area there is less resistance. Conventional currents flows in the opposite way of electron current. In terms of Ohm's law current is proportional to voltage and inversely proportional to the resistance.
In a vacuum, a beam of ions or electrons may be formed. In other conductive materials, the electric current is due to the flow of both positively and negatively charged particles at the same time. In still others, the current is entirely due to positive charge flow. For example, the electric currents in electrolytes are flows of electrically charged atoms (ions), which exist in both positive and negative varieties. In a common lead-acid electrochemical cell, electric currents are composed of positive hydrogen ions (protons) flowing in one direction, and negative sulfate ions flowing in the other. Electric currents in sparks or plasma are flows of electrons as well as positive and negative ions. In ice and in certain solid electrolytes, the electric current is entirely composed of flowing ions. In a semiconductor it is sometimes useful to think of the current as due to the flow of positive "holes" (the mobile positive charge carriers that are places where the semiconductor crystal is missing a valence electron). This is the case in a p-type semiconductor.
Positrons are a form of antimatter, wonder if the OP knew that? They are not naturally occuring particles either, but have to be manufactured on demand and used before they are consumed.Current requires electrical charges to move, not neccessarily electrons. Could also be ions, positrons. Quarks also have charge, but do not occur isolated.
A simple way of measuring skin conductance is to use a low voltage DC source. Two electrodes are placed on the skin, and the resulting current is measured. The current that flow in the electrode leads is the same current that flow in the skin and body tissue.I get the feeling some folks think that electricity changes when it enters the body. I disagree with that point of view.
From some years building electrofishing equipment, I can say that placing electrodes in impure water and applying a voltage will promote quite a bit of ionic conduction. I had to place a bit of protection circuitry in the control box to limit current at 15 amps.So I wonder how the current got there.
As I understand it ionic conduction is still electron flow, as in the case of salt water. There are two mechanism happening as I understand it, one is the ions themselves moving to their respective electrodes, and the second is the electrons moving from ion to ion. Do I have it wrong?From some years building electrofishing equipment, I can say that placing electrodes in impure water and applying a voltage will promote quite a bit of ionic conduction. I had to place a bit of protection circuitry in the control box to limit current at 15 amps.
by Aaron Carman
by Jake Hertz
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by Jake Hertz