A.
The position difference of each coil in space causes the maximum induced electromotive force of each coil to appear at different times;
B.
The induced electromotive force of each coil distributed has time phase difference, and its composite value is phasor and;
C.
The phasor sum of the induced electromotive force of the distributed coils is less than the algebraic sum of the induced emf of the concentrated coils;