A Field Help

[rip]

Can someone help explain to me the "A" Field here:

http://www.icehouse.net/john1/afield.jpg

I keep remebering the right hand rule that if you point your thumb in the direction of the current the way your fingers curve is the magnetic field. This agrees with one of the "A" Fields but not both.

Thank you for the help.
Rip

[amigo]

Hi rip,

Hmm, it does look weird to me, too...

I could be wrong but I think that one side of the rotor (left where North magnet) is inducing the current in the coil in one direction and the other side of the rotor (right, South) is following that direction because it is magnetically opposite of North, thus the "A" Field spin is identical on both ends.

If the rotor was monopolar (both Norths) then it would conflict with the flow of the current because the right side would create an opposing "A" Field spin.

Or maybe that's the whole idea, creating two opposing fields to induce a standing wave in the conductor...(or am I totally off here, not sure why I even thought about a standing wave, it just came to mind right now)