If you had a 9V battery and attached two wires to the positive and negative terminals, and the wires were ten?
Answer:
Voltmeters have an extremely high input resistance usually 20 megaohms per volt. So the answer would be yes. Now if you had an AC source rather than a DC source like the battery then there could be some parasitic losses would reduce the voltage.
It would depend on the gauge of the wire and the load impedance of the meter.
As long as the voltmeter had an infinite input impedance, yes
yes
The answer is absolutely yes as long as the wire is large and remains open and no load except your measuring device (voltmeter). You just have to use a volt meter with a high input impedance to minimize the voltage drop.
You can even go further that ten miles 40 miles if you want just don't put any load.
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