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Electrical Machines
In alternator, the rotary part is
core.
magnetic field poles.
none of these.
armature.
core.
magnetic field poles.
none of these.
armature.
Answer
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Related Question
Electrical Machines
Which of the following rotor requires damper winding?
None of these
Salient pole rotor.
Both type rotor.
Cylindrical rotor.
None of these
Salient pole rotor.
Both type rotor.
Cylindrical rotor.
Answer
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Electrical Machines
The three point starter is used for
Shunt motor as well as compound motors.
Series motor.
Shunt motor.
Shunt, compound and series motor.
Shunt motor as well as compound motors.
Series motor.
Shunt motor.
Shunt, compound and series motor.
Answer
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Electrical Machines
In which of the following speed control of DC motor the speed obtained is below than the rated speed?
Armature circuit resistance control.
Any of above.
Field resistance control.
Armature voltage control.
Armature circuit resistance control.
Any of above.
Field resistance control.
Armature voltage control.
Answer
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Electrical Machines
Rotating part of DC motor is known as
Carbone brush.
Starter.
Pole.
Armature.
Carbone brush.
Starter.
Pole.
Armature.
Answer
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Electrical Machines
A 3 - Φ, 400 / 200 V, Y - Y connected wound rotor induction motor has 0.06 Ω rotor resistance and 0.3 Ω standstill reactance per phase. To make the starting torque equal to maximum torque of the motor the additional resistance required
0.24 Ω.
0.66 Ω.
0.78 Ω.
0.45 Ω.
0.24 Ω.
0.66 Ω.
0.78 Ω.
0.45 Ω.
Answer
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