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Synchronous Motors
If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then
the back e.m.f. will be more than the supply voltage
the stator current will be zero
the stator current will be very high
the stator current will be very small
the back e.m.f. will be more than the supply voltage
the stator current will be zero
the stator current will be very high
the stator current will be very small
Answer
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Related Question
Synchronous Motors
Mostly, synchronous motors are of
Alternator type machines
Induction type machines
Salient pole type machines
Smooth cylindrical type machines
Alternator type machines
Induction type machines
Salient pole type machines
Smooth cylindrical type machines
Answer
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Synchronous Motors
The speed regulation of a synchronous motor is always
0.5%
1%
Zero
Positive
0.5%
1%
Zero
Positive
Answer
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Synchronous Motors
The pull out torque of a practical synchronous motor will occur when the torque angle is about _____
30°
0°
45°
75°
30°
0°
45°
75°
Answer
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Synchronous Motors
The rotor of a synchronous motor is
Salient pole type
Identical to that of a dc motor
None of the listed here
Nonsalient pole type
Salient pole type
Identical to that of a dc motor
None of the listed here
Nonsalient pole type
Answer
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Synchronous Motors
Synchronous motor always run at
More than synchronous speed
None of the listed here
Less than synchronous speed
The synchronous speed
More than synchronous speed
None of the listed here
Less than synchronous speed
The synchronous speed
Answer
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