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Electrical Machines

Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

 zero
 maximum
All of these
 minimum

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Electrical Machines
For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V.

 230 V.
 225 V.
  222 V.
 220 V.

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Electrical Machines
Voltage regulation can be determined by which of the following?

 Synchronous impedance method.
 ZPF method.
 MMf method.
All of these

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Electrical Machines
In above question, find rms line voltage for delta connection?

 100 V.
 399 V.
 50 V.
  230.2 V.

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Electrical Machines
Synchronising power of a synchronous motor varies

 directly as Xs2
 inversely as 1/Xs
 directly as synchronous reactances Xs
All of these

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Electrical Machines
Diverters are used only in

 either of these
None of these
 series motors
 shunt motors

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