Electrical Machines
An inverted V-curve of synchronous motor shows the variation of

 supply voltage and field current at constant excitation
 power factor and supply voltage during hunting
All of these
 power factor and dc excitation at constant load

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

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

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