Electrical Machines
In a transformer operating at constant voltage if the input frequency increases, the core loss

 increase.
 decrease.
None of these
 remains constant.

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

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

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