Can electrons flow in opposite directions on the same wire, see schematic!

[stevensrd1]

the common or middle wire is the path of least resistance,,electrons always take the path of least resistance, the shortest distance to ground, for each battery the path of least resistance is the middle or common wire. Its just what they teach when you learn about electronics and electron flow, is it not lol.

[poynt99]

Try looking at it this way: it's a standard bipolar or dual power supply. The middle wire is GND or common. Many op-amp circuits require dual supplies, as does the power amplifier in your stereo.

This is not strange, it just may look that way. See the link below of a dual supply from the mains. It's the same thing essentially.

Dual supply diagram

.99

[stevensrd1]

Yes I see what you are saying, but this is different. I still think I am correct, its what is taught, unless what is taught is incorrect. It is taught electrons always take the path of least resistance, which for both batteries would be the center wire. There is electron flow there, if you remove it there is motor speed change, if the wire had no flow there would be no change in motor speed if it was removed. Each motor spins at the speed it would if it was a separate circuit with only one motor and one battery. Neither motor is spinning faster as it would if it was a separate circuit with one motor and two batteries in series powering it, as that would increase the speed of a motor. So this explains it all I think. I dont think what they teach is incorrect in this respect, and they do teach electron flow takes the path of least resistance, which is the middle wire for each battery, after going through a motor. Now if we remove the middle wire,,then and only then the electrons only have one path to follow,,that would be through both batteries, as that would then be the path of least resistance, and that would speed one motor up as it would then be powered by the two batteries in series.

[poynt99]

Simplifiying the loads using resistors and redrawing the circuit can help understand what happens in two different scenarios. A current sense resistor (CSR1) of 0.01Ohm is added to probe actual current in the conductor in question.

The gnd_path_balanced.gif illustrates your circuit if both motors represent loads that are identical. Each load has 1A of electron flow. In this case the voltage probe will measure 0V and therefore no net electron flow in CSR1. This conductor can be removed with no effect to the current in each load.

The gnd_path_unbalanced.gif illustrates your circuit with one motor being half the resistance (double the load) than the other. In this case the voltage probe will measure about -77mV indicating a net electron flow of about 770mA. You should notice that the current through R2 is the sum of the currents through R1 and CSR1. This holds for all cases.

Familiarize yourself with Kirchoff's Current Law here:

http://www.facstaff.bucknell.edu/mastascu/elessonshtml/Basic/Basic4Ki.html

.99

[stevensrd1]

So your saying the path of least resistance is incorrect? Then why do they teach it, why do they say it like its a law that electrons take the path of least resistance, Im not sure I understand why they would teach something that is incorrect, when its obvious in my schematic what is the path of least resistance, I still dont buy it, look at the next schematic I will post.