The correct answer is: A. front pitch
The front pitch is the distance between the starts of two consecutive coils measured in terms of coil sides. It is the distance between the two adjacent sides of the same coil, measured from the center of one side to the center of the other side. The front pitch is an important factor in determining the performance of a coil, as it affects the amount of current that can flow through the coil and the amount of magnetic field that is produced.
The other options are incorrect because:
- B. winding pitch is the distance between the centers of two consecutive coils.
- C. commutator pitch is the distance between the two adjacent commutator segments.
- D. back pitch is the distance between the ends of two consecutive coils.