What forces are acting on electron in a circuit?
What is the source of such kind of forces?
Do electrons act on each other in electric current?
If i have an ordinary electric circuit with only one resistor, then if i raise resistance, the electric current goes down. As I understand it happens because the vector $\vec E$ of elecric field inside the conductor goes down. The main question is how electric field (vector $\vec E$) "feels" that i raised resistance? Well if I have a water flow in a tube i can imagine it. Assume some obstacle suddenly appears in a tube, then it stops the nearest moving molecules of water. This molecules of water stop molecules behind them, which then stops molecules behind them ...etc. And then all molecules are stopped. That's because molecules act on each other. It's like standing in a queue or walking in a crowd. If some man in front of me stops, then I will stop and the man behind of me will stop too. But what about electric current? Is it the same process? Do electrons act each other like molecules of water or like people in a crowd? If it's true that means electric field caused by electrons themself? I'm not only interested about how electric field distributed inside a conductor, I'm interested about the source of that field too.