Electrical Machines
Maximum power will be developed when back emf is

 double the supply voltage.
 equal to supply voltage.
All of these
 half of the supply voltage.

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

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

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