Stupid Question #2: how does an iron frame act as a ground on our cars

[ericr]

-or any car, for that matter. but I'll bet some of us have wondered about this.


our cars are DC of course, meaning, apparently, that there is a constant flow of electrons through the system when some application is using electricity. how can a frame of iron/steel act as a successful conductor for one pole of the battery?


We don't associate iron/steel as being a significant conductor in other contexts....how can it be successful in electrical transmission on a car?