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Electrical Machines
The rotor power output of 3-phase induction motor is 15 KW. The rotor copper losses at a slip of 4% will be
625 W
650 W
700 W
600 W
625 W
650 W
700 W
600 W
Answer
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Related Question
Electrical Machines
Universal motor have which of the following application?
Lift.
Traction.
Domestic pump.
Food mixer.
Lift.
Traction.
Domestic pump.
Food mixer.
Answer
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Electrical Machines
When a DC cummulative compound wound motor is loaded
Both torque and speed decrease.
Torque increase and speed decrease.
Torque and speed both increase.
Torque decrease and speed increases.
Both torque and speed decrease.
Torque increase and speed decrease.
Torque and speed both increase.
Torque decrease and speed increases.
Answer
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Electrical Machines
Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator?
Commutator.
Equalizer rings.
Dummy coils.
Eye bolt.
Commutator.
Equalizer rings.
Dummy coils.
Eye bolt.
Answer
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Electrical Machines
Which of the following bearings and their uses are correct
both A and B
neither 1 nor 2
roller bearings → large machines
ball bearings → small machines
both A and B
neither 1 nor 2
roller bearings → large machines
ball bearings → small machines
Answer
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Electrical Machines
The slight curvature at the lower end of the OCC of a self excited DC generator is due to
magnetic inertia.
high field resistance.
high speed.
residual flux.
magnetic inertia.
high field resistance.
high speed.
residual flux.
Answer
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