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Electrical Machines

Electrical Machines
In salient pole synchronous machine, the reluctance power varies as

 cos2δ
 sin2δ
 cosδ
 sinδ

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Electrical Machines
In the V curve shown in figure below for a synchronous motor, the parameter of Y and X coordinates are, respectively

 Power factor and field current.
 Armature current and torque.
  Armature current and field current.
 Torque and field current.

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

 zero
 maximum
 minimum
All of these

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Electrical Machines
A DC generator without commutator is a

 induction motor
 AC generator
 DC motor
 DC generator

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Electrical Machines
The output indicate on the name plate of any motor is always the

  Output power at the shaft.
 Power drawn in KW.
 Power drawn in KVA.
 Gross power.

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Electrical Machines
The power developed by salient pole synchronous machine is/are

 power due to saliency or reluctance only
 both 1 and 2
None of these
 excitation power only

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