Correction...TPU Steven Marks Earth's MAGNETIC FIELD....oops.

[Justalabrat]

Seems to me if you just rotated a coil fast enough it would generate some voltage just using the earths magnetic field. Of course it would only be a very small voltage. But then again, if you used a lot of turns in your coil it would generate a higher voltage.

[wings]

suggest this reading:

http://www.geocities.com/terella1/

[mr_bojangles]

first thing that came to mind was a compass

maybe if you built a really strong one you could use energy from it wanting to go north



but actually in space you can let out a wire and just going through outer space induces electricity in the wire


NASA did it and the wire got so hot it broke the wire and it went sailing off into space

I think the electricity was generated form earths magnetic field


hope it helps

[gravityblock]

first thing that came to mind was a compass

maybe if you built a really strong one you could use energy from it wanting to go north



but actually in space you can let out a wire and just going through outer space induces electricity in the wire


NASA did it and the wire got so hot it broke the wire and it went sailing off into space

I think the electricity was generated form earths magnetic field


hope it helps

I believe Nasa's Tether broke due to a high current being induced in the 12 miles of cable that was dragged through the earth's magnetic field.  A higher than expected current was produced in the cable similar to how a homopolar generator produces a high current, which they did not take into account when figuring how much voltage and current would be produced in the cable, thus it burned up and broke. 

[sparks]

The Earth moves relative to the magnetosphere.  The magnetosphere field is produced by magnetohydrodynamics.  The plasma currents inside the Earth are complicated because of convective currents due to different core temps as well as what I believe are the primordial plasma currents that formed the Earth as the Sun contracted.  The Earth's surface moves relative to the dynamo field and generates voltage between the poles.  The magnetic field density increases at the poles but this is where the relative motion across this magnetic flux is least.  Therefore the entire planet becomes a dynamic emfield which has been quite stable for a long time.  I believe ancient civilizations have identified hot spots or geomagnetic lines of force that are in a constant state of flux change due to the internal magnetohydrodynamics.  Unfortunately these hot spots migrate but I betya there are still many of them around.  I believe harp is trying to produce a continual conductor of ionized gas that will "move" through the condensed magnetic field at the polar cap.  This will get some manmade aurora deal going on and continual current from one end of the plasma field produced by Harp to points outside of the magnetosphere.  No idea as to what is going to come down that wire.