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Synchronous Motors
Power factor of a synchronous motor is unity when
The armature current is maximum
The armature current is zero
None of the listed here
The armature current is minimum
The armature current is maximum
The armature current is zero
None of the listed here
The armature current is minimum
Answer
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Related Question
Synchronous Motors
A synchronous motor develop maximum power when load angle is
120°
90°
45°
60°
120°
90°
45°
60°
Answer
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Synchronous Motors
The maximum speed variation in a 3 phase synchronous motor is
Zero
4 percent
10 percent
2 percent
Zero
4 percent
10 percent
2 percent
Answer
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Synchronous Motors
A synchronous motor can be started by
Provinding damper winding
All of the listed here
Dc compound motor
Pony motor
Provinding damper winding
All of the listed here
Dc compound motor
Pony motor
Answer
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Synchronous Motors
When a synchronous motor is on no load, the torque angle is about ________
45° electrical
30° electrical
0° electrical
90° electrical
45° electrical
30° electrical
0° electrical
90° electrical
Answer
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Synchronous Motors
The ratio of starting torque to running torque in a synchronous motor is
One
Two
Infinity
Zero
One
Two
Infinity
Zero
Answer
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