Why do resistors in series add-up? Is there any visualization equivalent of that? I have in mind electrons as cars driving on the highway, now a resistor could be a narrow spot (R1) where cars are moving slower, if I will "add" another congestion point R2 (resistor), after the first one, the cars that had already past by R1 will continue on R2, in case R2 is narrower they will slow down even more, in case R2 is wider it will be no problem since the cars will move freely, in case R2 is the same again the cars will move freely after the first congestion point R1
Can someone explain in that way why should the total R is equal to R1+R2?
|Many thanks in advance!