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Synchronous Motors
Most of the synchronous motors are _______ power factor metors.
Unity
0.8 lagging
0.8 leading
0.5 leading
Unity
0.8 lagging
0.8 leading
0.5 leading
Answer
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Related Question
Synchronous Motors
When a synchronous motor is pulled out of synchronism, the stator current ________
Become zero
Is increased too much
Remains unchanged
Is decreased too much
Become zero
Is increased too much
Remains unchanged
Is decreased too much
Answer
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Synchronous Motors
A synchronous motor develop maximum power when load angle is
60°
90°
45°
120°
60°
90°
45°
120°
Answer
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Synchronous Motors
The ratio of starting torque to running torque in a synchronous motor is
Infinity
One
Zero
Two
Infinity
One
Zero
Two
Answer
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Synchronous Motors
A synchronous motor develops maximum power when load angle is
120°
60°
45°
90°
120°
60°
45°
90°
Answer
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Synchronous Motors
In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then
the excitation is said to be zero per cent
the excitation is said to be hundred per cent
the motor is said to be fully loaded
the torque generated is maximum
the excitation is said to be zero per cent
the excitation is said to be hundred per cent
the motor is said to be fully loaded
the torque generated is maximum
Answer
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