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Electrical Machines
Which of the following is minimized by laminating the core of a transformer?
Stray loss.
Eddy current loss.
Copper loss.
Hysteresis loss.
Stray loss.
Eddy current loss.
Copper loss.
Hysteresis loss.
Answer
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Related Question
Electrical Machines
In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be
PN/2.
PN/60.
PN/120.
PN/3000.
PN/2.
PN/60.
PN/120.
PN/3000.
Answer
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Electrical Machines
The speed of rotation of 5th harmonic component in the stator of an induction motor is
5 times the synchronous speed.
0.5 times the synchronous speed.
(1 / 15) times the synchronous speed.
(1 / 5) times the synchronous speed.
5 times the synchronous speed.
0.5 times the synchronous speed.
(1 / 15) times the synchronous speed.
(1 / 5) times the synchronous speed.
Answer
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Electrical Machines
The stator frame in an induction motor is used to
hold armature stamping in position.
provide return path for the flux.
protect the whole machine.
ventilate the armature.
hold armature stamping in position.
provide return path for the flux.
protect the whole machine.
ventilate the armature.
Answer
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Electrical Machines
In a DC compound motor the field regulator is provided to
demagnetize the field partially.
control the field flux.
control the armature flux.
limit the armature current.
demagnetize the field partially.
control the field flux.
control the armature flux.
limit the armature current.
Answer
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Electrical Machines
The basic function of a transformer is to change
the power factor
the power level
the frequency
the level of the voltage
the power factor
the power level
the frequency
the level of the voltage
Answer
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