To reduce power loss in the cable.
With kitchen tongs. A mild tingling indicates low voltage/low amperage. Muscular spasms indicate high voltage/low amperage. Unconsciousness sans death indicates low voltage/moderate amperage. Death indicates high amperage. Good luck.
The electricity is transported and distributed by the use of the national grid and the step down and the step up transformers.
The flowing of electricity (amperage) is governed by the internal resistance of the connected device.
Copper is an extremely efficient conductor of electricity with very low resistance. It virtually eliminates the loss of voltage/amperage when the electricity from the solar cell is being transferred to a battery or the power grid.
A coil doesn't make electricity it can however alter voltage and amperage output.
A voltage and amperage need to be stated to answer this question.
A step up transformer converts low voltage,high amperage current to a high voltage,low amperage current. It requires large diameter wire to carry the high amperage in the primary coil.
"Wind power" in itself isn't transported, but the generators of wind power (wind turbines) are transported by delivery trucks. The energy they produce is electricity, and this is transported along cables into the grid.
There are several amperage ratings on AC compressors/motors. Locked Motor Amperage (LRA) is the amperage that the motor is fused for. The load of the motor is expressed in amperage or wattage, which is probably the case here. Low amperage readings on an AC unit being charged by amperage load would indicate low freon. High amperage readings indicate overcharge when charging by the amperage load. AC units are not accurately charged by amperage readings and the efficiency of motors is not expressed in amperage readings.
by wires under ground under neath my feet
It is neither more or less dangerous . The determining danger factor is amperage.
Chemicals do not always have to be dissolved in water to conduct electricity. Aluminum is 'purified' by electrolysis in the molted form. In the 1700's other metals were 'purified' by electrolysis as well with no water involved. Actually if water had been present it would not have allowed the chemical breakdown to occur to give a sample of ther free metal. Water solutions will conduct electricity of low voltage and amperage. The electrolysis mentioned above requires higher voltage and amperage ... much higher.