trendsetter37
The Living Force
Richard S said:In that case, how does one complete an electrical circuit with only one wire, and it is clear there are no other wires coming from anywhere else? There are always people who make the claim that there is some sort of trickery involved as such a thing can not possibly work as claimed. Most often, they are right, but that doesn't mean they always are.
Removing the ground wire and then sticking it somewhere else in the ground illustrates that the wire doesn't lead to an AC power source. This would all take place on camera of course, but to be clear I am not saying that it has to work without the ground, only that it would show that it is not connected to some other device underground.
And you do not need a "closed circuit" for AC to work.
__http://physics.stackexchange.com/questions/74625/does-alternating-current-ac-require-a-complete-circuit
BluRaja (Questioner) said:My issue is that they all assume that AC requires a complete circuit in order to function. However, my understanding is that a complete circuit is necessary for DC, but not AC. My intuitive understanding is that AC is similar to two gas-filled rooms with a pump between them - the pump couldn't indefinitely pump gas from one room to another without a complete circuit (DC), but it could pump the gas back and forth indefinitely (AC). In the latter case, not having a complete circuit just offers more resistance to the pump (with smaller rooms causing a larger resistance).
{snip}
__http://physics.stackexchange.com/questions/74625/does-alternating-current-ac-require-a-complete-circuit#74999
Rod Vance said:{snipped greek}
So you're dead right in your question: there is no need for a closed conduction path, but instead we have the more general concept of the total current - conduction and displacement - contributing to the continuity equation rather than only the conduction current. Where the conduction current leaves off at the plates of a capacitor, the displacement current "takes over" to make sure that the continuity equation stays fulfilled.
{snip}
TLDR, Wearing shoes will not help if you touch an exposed live AC wire, however it is a different story with DC as long as your body isn't a better source to ground than the rest of the circuit. Well...let's also assume we are talking about voltages that are not high enough to arc.
At least that's what I got from the above exchange, along with personal experiences.
A visual example of what AC can do with only "one wire". I.e. the metallic section going to ground.
That is a reverse example of what I state above but it's still an example of an "open circuit" using AC. The point being that AC does not need two physical connection for power to flow so it is still a valid request to show that an AC power source doesn't exist. Correct me if I'm wrong.