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Synchronous Motors
The magnitude of field flux in a 3-phase synchronous motor
Varies with the load
Remains constant at all loads
Varies with speed
Varies with power factor
Varies with the load
Remains constant at all loads
Varies with speed
Varies with power factor
Answer
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Related Question
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
The speed of a synchronous motor can be changed by varying _______
None of the listed here
Field excitation
Mechanical load
Supply frequency
None of the listed here
Field excitation
Mechanical load
Supply frequency
Answer
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Synchronous Motors
While running, a synchronous motor is compelled to run at synchronous speed because of _______
Induced emf in rotor field winding by stator flux
Compulsion due to lenz's law
Damper winding in its pole faces
Magnetic locking between stator and rotor poles
Induced emf in rotor field winding by stator flux
Compulsion due to lenz's law
Damper winding in its pole faces
Magnetic locking between stator and rotor poles
Answer
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Synchronous Motors
The power factor correction capability of a loaded synchronous motor _____ with the increases in mechanical load.
Decreases
None of the listed here
Remains unchanged
Increases
Decreases
None of the listed here
Remains unchanged
Increases
Answer
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Synchronous Motors
The percentage slip in case of a synchronous motor is
zero
0.005
1
0.01
zero
0.005
1
0.01
Answer
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