I have a hypothetical scenario that would help me better understand (I hope) electrical fields and propagation of electrical fields better.
So let's have a super simple circuit with one voltage source and one resistor:
I understand that Ohms law says that I=U/R so using that we would see 50mA flowing through the whole circuit.
Now I have the hypothetical scenario: lets make this circuit veeeeery large.
Large so that the wires would be 10 times the length that speed of light can travel in one second.
If we presume that the wires are made from perfect superconducting material and have no losses in themselves, how fast will electrical field establish itself at location where our resistor R1 is (be at 5V).
Would current flow unobstructed the whole length with the same current strength until it reaches the R1 resistor and would it only at that time "reduce" itself to 50mA when it is impeded by R1 resistance?