To eliminate rth harmonic from the induced emf in a phase of a synchronous machine the pitch of the coil must be
A. (r – 1)/r th fraction of full pitch.
B. (2r – 1)/r th fraction of full pitch.
C. r/(r + 1) & th fraction of full pitch.
D. 2r/(r + 1) th fraction of full pitch.
Answer:A
To eliminate rth harmonic from the induced emf in a phase of a synchronous machine the pitch of the coil must be
A. (r – 1)/r th fraction of full pitch. B. (2r – 1)/r th fraction of full pitch. C. r/(r + 1) & th fraction of full pitch. D. 2r/(r + 1) th fraction of full pitch.