Electrical Machines
In induction motors, there is large decrease in maximum power factor when the dispersion coefficient is ________________.

 decreased.
 remains same.
  increased.
 kept constant to certain value.

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Electrical Machines
Which of the following represents the commutator pitch?

 Number of conductors spanned by one coil at the front end of the armature.
 Number of commutator segments between two successive coils.
 The distance between the staring of first coil and its next successive coil
 Number of conductors spanned by one coil at the back end of the armature.

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