Saturday 24 January 2015

voltage - How can an electron have 0 electric potential after exiting a resistor but have current?


Unfortunately, I am not able to respond and ask a question on this specific post so I am going to ask a question based on the answers of the user "Transistor" in this post because I am still confused.


https://electronics.stackexchange.com/a/217000/211088


All my statements are based on the assumption that electrons have 0 electric potential after they go through the last load or is at the end of the circuit. (Statement # 2).


Please tell me if these statements are correct:




  1. Electric Potential is the force created from all the electrons in the negative terminal of the battery. The force is created from the electrons pushing away from each other trying to go to the positive terminal which also pulls the electrons.


So does this create 2 times the force because of an electron's push and the positive terminal's pull? Or does the push and pull just the electric potential? I'm confused about this part of statement 1.




  1. If I have one battery and one resistor only, from what I understand is that after electrons exit the resistor, they have 0 electric potentials.




  2. My understanding based on the first answer of "Transistor":






It's getting pushed by the potential difference in other parts of the circuit.



This statement is referring to electrons in between resistors.


After the electrons exit the resistor, even though they have an electric potential of 0, they still flow to the positive terminal because of the fact that the electrons currently flowing through the resistor has an electric potential, therefore, it needs to move forward and exit the resistor which pushes the electrons already out of the resistor towards the positive terminal. Doesn't this mean that the electrons out of the resistor already has an electric potential because the electrons in the resistor provide a force for them? Aren't they have 0 electric potentials at the end of the circuit?



  1. In figure 2, in the post that I linked above, when the user "Transistor" replies




What's driving the current is the potential difference between the top of the tank (battery +) and the open end of the pipe (battery -).



Does this mean that after the electrons exit the resistor, the negative terminal is no longer apply a force or push but now the positive terminal is applying a pull force? So if I place a voltmeter on each side of the resistor, it reads the voltage of the negative electric potential. Is this why electrons are still able to flow to the positive terminal even though it has 0 electric potential? Basically the same question as statement 1. Can someone explain the quote above.


Sorry for bad format, this is my first post.




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