I have a question regarding this part from a book on electrical machinery (the author is highly reputed in India). While teaching the motor action at an elementary level, the torque developed in the motor is explained using the equation F=Bil. But this paragraph says that the torque developed is due to the interaction of the two magnetic fields and actual flux cutting the conductors is very small. The rotor is pulled by the poles at some angle and the tangential component of this pull is responsible for the torque. (wikipedia says something similar: https://www.google.co.in/url?sa=t&s...SgCMAA&usg=AFQjCNHxYQcr7f_2j_DYuUpo5OpNoLi5tw). I understand this part completely. But since the flux through the conductors is very small, shouldn't this affect the back emf? We write torque T∝ I*Φ and Eback∝Φ*N, but how can we take the same Φ in both the equations? For torque, the flux in the tooth section is responsible and for back emf, air gap flux linking with the conductors is responsible, which is practically much smaller than the teeth flux. What am I missing? Thanks in advance.