| On Mar 2, 4:35 am, "Chugga Chug" wrote: |> In this room I have a socket on the wall marked "230 V AC", but there is |> nothing plugged in. |>
|> If there is no load, then there is no current flow from the socket. If there |> can only be current flow into a load, then does this mean that I no longer |> have AC (alternating current)? |>
|> So why do we say AC, when we really mean AV? Just a thought! | | I can attempt to at least partially answer your question even without | my morning cup of coffee. :) | There is still voltage at those contacts even though nothing is | plugged into it, i.e. just because | your widget isn't plugged in doesn't mean the whole grid just shut | down obviously. :) So there | is still alternating voltage, as you indicate, you're just not tapping | into it. Therefore, there is | no current flowing, and thus no "alternating current".
Actually, there is alternating current flowing. How much depends on how far the wire runs. There's only voltage at the end, but there is current along the wires. It's called "charging current".