Over a very limited range - yes.  You will need to have a return path that is supported by electric fields.  The best way to look at this would be like a AC coupled circuit - coupled through a capacitor of which the capacitor is formed by some plate that the circuit is coupled to and another plate that is providing a return path.

We know that electric fields can couple over long-ish distances, some Anti-aircraft proximity fuzes from WWII used an e-field detection technique that would trigger the bomb because the shell and the aircraft would be carrying different levels of charge and thus e-field lines would form linking the two and thus change the capacitance in an internal circuit.

This in no way violates physics, it's best to view it as a capacitor that is so physically large that you can walk between the plates.  However, the actual capacitance value would be very small.

uChip just released some technology that uses a similar effect that is called GestIC and they couple with E-Fields.  Here they couple on both the top rail and the return path so it is a "Zero" wire solution.  But it will also work if you ground one of the plates inside the remote device to one polarity of the plate in the "pad".

Can you send data usefully over one wire, literally one wire?
I want to play NFS Most Wanted on the PC and I do not have any Graphic Card. While installing this system asks to install Directx (Even I have already installed it) and displays an Internal system error.

Please somebody guide me about this game and Directx Issues.
