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Electrical Machines

Electrical Machines
A DC generator beyond critical resistance will generate

 maximum current.
 maximum voltage.
 no voltage.
 maximum power.

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Electrical Machines
It is advisable to start a DC series motor with some load to

 Avoid sparking.
 Limit the current.
 Limit the flux.
  Limit the speed.

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Electrical Machines
In normal dc machines operating at full-load conditions, the most powerful electromagnet is

 armature winding
 interpole and compensating windings together
 field winding
 interpole winding

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Electrical Machines
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss?

 100W
 60W
 80W
 40W

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

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

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Electrical Machines
Which of the following relation is correct?

None of these
 Xd = Xq.
 Xd < Xq.
 Xd > Xq.

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MORE MCQ ON Electrical Machines

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