\[\text K_{P}=\frac{\text { The emf induced } \mid \text { coil in short pitched winding }}{\text { The emf induced } \mid \text { coil in full pitched winding }}\]
\[\text K_{P}=\frac{\text { The vector sum of induced emf } \mid \text { coil }}{\text { Arithmetic sumof induced emf } \mid \text { coil }}\]
\[\text {Kp}=\cos \alpha / 2\]