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Electrical Machines
Armature resistance control method is used for the _______ ?
both 1 and 2
below rated speed
None of these
above rated speed
both 1 and 2
below rated speed
None of these
above rated speed
Answer
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Related Question
Electrical Machines
An alternator is feeding an infinite busbar. Its prime mover is suddenly shutdown. The alternator will
come to stand still.
continue to work as synchronous motor with same direction of rotation.
continue to work as alternator but the direction of rotation will reverse.
start working as induction motor.
come to stand still.
continue to work as synchronous motor with same direction of rotation.
continue to work as alternator but the direction of rotation will reverse.
start working as induction motor.
Answer
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Electrical Machines
In an auto transformer, for what value of turn ratio, power transferred by inductively and conductively are same?
0.5
1
0
any of the above
0.5
1
0
any of the above
Answer
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Electrical Machines
The effect of ------------------ on main field flux is armature reaction?
armature current
armature mmf
All of these
armature flux
armature current
armature mmf
All of these
armature flux
Answer
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Electrical Machines
The magnetic field which initially induces emf in the armature in a self excited DC generator is because of
permanent magnets.
residual magnetism.
armature reaction.
None of these
permanent magnets.
residual magnetism.
armature reaction.
None of these
Answer
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Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?
1
6
4
2
1
6
4
2
Answer
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