using electro mag field to assist in separating water/ electrolysis

Electrolysis is about transferring electrons at the electrode surfaces. It is difficult to visualise how a superimposed magnetic field would have any significant effect.

Frank, honest answer ? It's a crock of shit !!!!

Worth a try if you got time on your hands, let us know how it goes!

Oh, and unless I am mistaken your polar orientation will be vertical and your car's compass should be whacked.

Is an interesting concept. I admire your ability to look outside the square.

Unfortunately the idea of attracting positive or negative charged particles to a home based magnet of specific polarity (regardless if AC or DC) will not work.

Positive/negative charged electrons and ions have different laws of attraction regards that of a magnet.

Adding a magnetic field to electrolysis has no benefit to the electrolysis process itself. You can, if you're clever, control the movement of the ions via a magnetic field (think of an older CRT), but that is generally of no use in electrolysis; it can be seen, however, in some plating processes. Further, you would need perhaps several hundred turns of the wire at, say, 10A in order to get any appreciable field.

Remember that a static magnetic field only interacts with moving charge or that static charge only interacts with moving magnetic fields. Moreover, the interaction is vectoral.

If you're interested in pursuing this kind of question, I'd suggest you download the free version of Quickfield. This should allow you to make some simple simulations, though it will not tell you much about electrolysis efficiency.