Electrical Machines
Wave winding is prefered for which of the following rating?

 low current and high voltage
 high current and low voltage
 low current and low voltage
 high current and high voltage

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Electrical Machines
An alternator is feeding an infinite busbar. Its prime mover is suddenly shutdown. The alternator will

 come to stand still.
 continue to work as synchronous motor with same direction of rotation.
 continue to work as alternator but the direction of rotation will reverse.
 start working as induction motor.

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Electrical Machines
Which of the following represents the commutator pitch?

 Number of commutator segments between two successive coils.
 Number of conductors spanned by one coil at the back end of the armature.
 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.

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