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Synchronous Motors
The percentage slip in case of a synchronous motor is
1
0.01
0.005
zero
1
0.01
0.005
zero
Answer
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Related Question
Synchronous Motors
In a synchronous motor, the rotor copper loss are met by ______
Dc source
Armature input
Motor input
Supply lines
Dc source
Armature input
Motor input
Supply lines
Answer
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Synchronous Motors
When pull-out torque occurs in a synchronous motor, the poles of the rotor are _______
45° (electrical) behind stator poles
None of the listed here
Coincident with statorbpoles
Mid way between N and S poles of stator
45° (electrical) behind stator poles
None of the listed here
Coincident with statorbpoles
Mid way between N and S poles of stator
Answer
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Synchronous Motors
If a synchronous motor is operating at a supply frequency of 50 cycles/second, then, rotor revolves at ______
50 cycles/second
None of the listed here
25 cycles/ second
100 cycles/second
50 cycles/second
None of the listed here
25 cycles/ second
100 cycles/second
Answer
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Synchronous Motors
When a unity pf synchronous motor is operated at a leading pf, it results in _______
Less than rated horsepower output
More than rated horseppwer output
More than rated rotor current
None of the listed here
Less than rated horsepower output
More than rated horseppwer output
More than rated rotor current
None of the listed here
Answer
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Synchronous Motors
The size of a synchronous motor decreases with the increase in
All of the listed here
Flux density
Speed
Horse power rating
All of the listed here
Flux density
Speed
Horse power rating
Answer
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