Electrical Machines
Air core transformer as compared to iron core transformer, has

  no magnetic core loss.
 less magnetic core loss.
 more magnetic core loss.
  more copper loss.

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Electrical Machines
In a step down transformer which one of the following statements is true?

 Secondary power is less than primary power.
  Number of secondary turns is less than primary turns.
 Number of secondary turns is more than that of primary.
 Secondary current is less than primary current.

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