Electrical Machines
For an ideal transformer the winding should have

 minimum resistance on primary side and maximum resistance on secondary side
 maximum resistance on primary side and least resistance on secondary side
 no ohmic resistance on either side
 equal resistance on primary and secondary side

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Electrical Machines
Which of the following represents the commutator pitch?

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

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