Electrical Machines
If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will

 Oscillate around the normal speed.
 Reduce.
 Increase.
 Remain unaltered.

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Electrical Machines
Which of the following statements is/are correct statements?

 EMF per turn in HV winding is less than EMF per turn in LV winding
All of these
 EMF per turn in HV winding is more than EMF per turn in LV winding
 EMF per turn in both the windings are equal

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Electrical Machines
Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between

 Rotor mmf wave and resultant flux density wave.
  Rotor mmf wave and stator mmf wave.
 Stator mmf wave and resultant flux density.
 Stator mmf wave and resultant mmf wave.

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