Are you talking about per turn of wire in one coil, or two or more sets of coils connected in series?
A "coil" is usually wound around a single pole piece, so all the turns in that coil would have the same instantaneous induced volts per turn. Obviously, the current is the same in each turn. If you connected two or more sets of coils where each is wound on a different pole piece, depending on the configuration of rotating field, the induced voltage in the different coils might peak at different positions of the rotor.