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Electrical Machines
A 3 - Φ, 6 pole, 50 Hz IM has a rotor speed of 987 rpm find rotor frequency?
0.75 Hz.
0.65 Hz.
60 Hz.
0.70 Hz.
0.75 Hz.
0.65 Hz.
60 Hz.
0.70 Hz.
Answer
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Related Question
Electrical Machines
Silicon content in steel lamination is kept within 5% as it
increases hysteresis loss.
All of these
makes the material brittle.
Increases cost.
increases hysteresis loss.
All of these
makes the material brittle.
Increases cost.
Answer
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Electrical Machines
Wave winding is employed in DC machine of
high current and low voltage rating.
low current and low voltage rating.
low current and high voltage rating.
high current and low voltage rating.
high current and low voltage rating.
low current and low voltage rating.
low current and high voltage rating.
high current and low voltage rating.
Answer
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Electrical Machines
If the field of a dc shunt motor gets opened while the motor is running, then the
armature current will drop
motor will become slow.
motor will attain dangerously high speed
armature will oscillate about original speed as the mean speed
armature current will drop
motor will become slow.
motor will attain dangerously high speed
armature will oscillate about original speed as the mean speed
Answer
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Electrical Machines
What is the emf generated by a 4 pole Lap connected DC Motor rotating at 1500 rpm having 1000 conductors and useful flux per pole is 0.4 mWb.
20 volts.
40 volts.
10 volts.
30 volts.
20 volts.
40 volts.
10 volts.
30 volts.
Answer
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Electrical Machines
Compensating winding is placed in the
pole shoe
main field
All of these
armature core
pole shoe
main field
All of these
armature core
Answer
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