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Electrical Machines

Electrical Machines
Eddy current loss will depends on

 Flux density
 Frequency
 Thickness
All of these

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Electrical Machines
In a single phase induction motor, the starting torque developed is proportional to

 supply voltage V
 V²
 1/V²
 1/V

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Electrical Machines
In dc machines, the space waveform of the air-gap flux distribution affects

 voltage but not the torque
 neither the voltage nor the torque
 torque but not the voltage
 both the torque and voltage

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Electrical Machines
If a DC motor is connected across the AC supply it will

 Not run.
 Run at normal speed.
  Burn.
 Run at lower speed.

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Electrical Machines
A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

  0.5 Amp.
 320 Amp.
  400 Amp.
 800 Amp.

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Electrical Machines
Flux density under leading pole tips in case of generator will

 decrease
None of these
 increase
 either increase or decrease

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MORE MCQ ON Electrical Machines

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