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Electrical Machines
In DC generator, full form of MNA is what?
Magnetic neutral axis.
Magnetic no-load axis.
Magnetically no-load armature co-ordinate.
Magnetic neutral armature co-ordinate.
Magnetic neutral axis.
Magnetic no-load axis.
Magnetically no-load armature co-ordinate.
Magnetic neutral armature co-ordinate.
Answer
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Related Question
Electrical Machines
The armature voltage control is considered suitable for a DC motor driven at constant
speed.
power.
current.
torque.
speed.
power.
current.
torque.
Answer
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Electrical Machines
If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by
Kef2Kf2Bm.
Kef2KfBm2.
KefKf2Bm2.
Kef2Kf2Bm2.
Kef2Kf2Bm.
Kef2KfBm2.
KefKf2Bm2.
Kef2Kf2Bm2.
Answer
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Electrical Machines
Air core transformer as compared to iron core transformer, has
less magnetic core loss.
more copper loss.
no magnetic core loss.
more magnetic core loss.
less magnetic core loss.
more copper loss.
no magnetic core loss.
more magnetic core loss.
Answer
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Electrical Machines
The core flux in transformer depends mainly on
supply voltage and load
supply voltage
supply voltage, frequency and load
supply voltage and frequency
supply voltage and load
supply voltage
supply voltage, frequency and load
supply voltage and frequency
Answer
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Electrical Machines
Flashing of DC generator means
creation of residual magnetism by a DC source.
neutralization of residual magnetism.
None of these
increasing flux density by providing extra ampere-turns in field.
creation of residual magnetism by a DC source.
neutralization of residual magnetism.
None of these
increasing flux density by providing extra ampere-turns in field.
Answer
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