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The pitch factor, in rotating electrical machinery, is defined as the ratio of resultant EMF of a _________

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The pitch factor, in rotating electrical machinery, is defined as the ratio of resultant EMF of a _________

(a) full-pitched coil to that of a chorded coil

(b) full-pitched coil to the phase EMF

(c) chorded coil to the phase EMF

(d) chorded coil to that of a full-pitched coil

The question was posed to me in an interview for internship.

My question comes from EMF Polygon in chapter Synchronous Machines of Electrical Machines

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Right option is (d) chorded coil to that of a full-pitched coil

To explain: Kp = Resultant EMF of a chorded coil/Resultant EMF of a full pitched coil = cosε/2.

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