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Electrical Machines
In a DC generator, the armature reaction results in
magnetization of inter poles.
demagnetization of centers of poles.
demagnetization of leading & magnetization of trailing pole tip.
magnetization of leading and demagnetization of trailing pole tip.
magnetization of inter poles.
demagnetization of centers of poles.
demagnetization of leading & magnetization of trailing pole tip.
magnetization of leading and demagnetization of trailing pole tip.
Answer
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Related Question
Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?
2
4
1
6
2
4
1
6
Answer
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Electrical Machines
For satisfactory performance of 3-phase 480V, 60 Hz induction motor, the supply voltage at 50 Hz should be equal to
350 V.
400 V.
420 V.
480 V.
350 V.
400 V.
420 V.
480 V.
Answer
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Electrical Machines
If two 8-pole dc machines of identical armature sare wound, one with lap winding and the other with wave winding, then
wave-wound machine will have more rated voltage and less current
lap-wound machine will have more rated voltage and more current
lap-wound machine will have more rated voltage and less current
wave-wound machine will have more rated current and more voltage
wave-wound machine will have more rated voltage and less current
lap-wound machine will have more rated voltage and more current
lap-wound machine will have more rated voltage and less current
wave-wound machine will have more rated current and more voltage
Answer
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Electrical Machines
The direction of rotation of a DC motor can be determent by
Lenzs law.
Amperes law.
Flemings right hand rule.
Flemings left hand rule.
Lenzs law.
Amperes law.
Flemings right hand rule.
Flemings left hand rule.
Answer
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Electrical Machines
In auto transformer if the turn ratio is K, what is the power transferred inductively?
both A and B
(1-K) × input power
None of these
K × input power
both A and B
(1-K) × input power
None of these
K × input power
Answer
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