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Electrical Machines
The armature of DC motor is laminated
to reduce the inductor.
to reduce the hysteresis loss.
to reduce the mass.
to reduce the eddy current loss.
to reduce the inductor.
to reduce the hysteresis loss.
to reduce the mass.
to reduce the eddy current loss.
Answer
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Related Question
Electrical Machines
The induction motor shaft is made of
mild steel.
cast iron.
aluminium.
stainless steel.
mild steel.
cast iron.
aluminium.
stainless steel.
Answer
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Electrical Machines
If the excitation is increased, the power factor is
leading power factor
unity power factor
None of these
lagging power factor
leading power factor
unity power factor
None of these
lagging power factor
Answer
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Electrical Machines
Resistance commutation is used generally in case of
DC machines above 10 kW.
None of these
fractional kW DC machines.
DC machines bellow 5 kW.
DC machines above 10 kW.
None of these
fractional kW DC machines.
DC machines bellow 5 kW.
Answer
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Electrical Machines
A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be
0.54 Ω.
0.54 Ω.
0.01 Ω.
0.06 Ω.
0.54 Ω.
0.54 Ω.
0.01 Ω.
0.06 Ω.
Answer
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Electrical Machines
Hysteresis loop represents the area of
eddy current loss
total iron losses
hysteresis loss
copper loss
eddy current loss
total iron losses
hysteresis loss
copper loss
Answer
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