Electrical Machines
For a single phase capacitor start induction motor which of the following is valid?

  Rotation can be changed by reversing main winding terminals.
 Rotation can be changed by interchanging supply terminals.
 None of these.
 Direction of rotation cannot be changed.

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Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

 shift forward by less than 90°
 shift forward by more than 90°
 shift forward by 90°
 coincide with the GNA

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