___Last question first, "p/s my god !!! i and my group member was discusing to conduct this experiment under the power line tower in my area as to find the effect of electromagnetic wave under the powerline.... so i assume it is very dangerous ....to do so right ?"
___Yes it can be very dangerous. If you are in the US, the only lines carrying 240Volts are the ones leading to your house from the big can (transformer) on the utility pole. The lines running pole-to-pole which feed the transformers carry 35,000-45,000 Volts. They lead to substations where more transformers receive the transmission line power at 150,000 -300,000+ Volts (AC on all this by the way). Now if your wire is relatively small, the danger of shock is minimal. If you left the wire on a coil or wound a coil as UncleAl suggested, & connected it to the meter, you should be OK to measure under power lines. As always with unknown current, don't hold any bare wires. Use some insulated alligator clips or such a matter.
___As to how to connect the circuit, you can try one big loop (or small coil, which is the big loop wrapped many small times) whith your meter attached one probe to each end of the wire. Another way is as you describe, with one end of the wire free, the other end connected to + (Red) on meter & the - (black) meter electrode stuck in the ground. A good true ground to Earth requires a longer probe into the ground than the meter has, & maybe even changing the depth of the ground probe is an experiment variable.
___Finally, here is a link to a couple pictures of the big antenna in Nevada drawing all that voltage. The guy that built it calls it a "loop' antenna, but he never answered me when I wrote asking exactly how the circuit is wired.
http://www.coasttocoastam.com/gen/page159.html
Re: waves
semantics is not always just pedantic quibbling. ~ douglas r. hofstadter
Re: waves
