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Electrical Machines
Which of the following is/are the methods to reduce the armature reaction and its effects?
pole chamfering
All of these
pole stacking
compensating winding
pole chamfering
All of these
pole stacking
compensating winding
Answer
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Related Question
Electrical Machines
Which motor used in Lathe machine?
D.C. cumulative compound motor.
None of these
D.C. shunt motor.
D.C . series motor.
D.C. cumulative compound motor.
None of these
D.C. shunt motor.
D.C . series motor.
Answer
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Electrical Machines
Commutators in DC machines have a role of which converts
high voltage DC to low voltage DC.
AC to DC.
none of these.
Both AC to DC and DC to AC.
high voltage DC to low voltage DC.
AC to DC.
none of these.
Both AC to DC and DC to AC.
Answer
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Electrical Machines
In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________.
remains unchanged.
increased.
decreased.
kept constant to certain value.
remains unchanged.
increased.
decreased.
kept constant to certain value.
Answer
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Electrical Machines
A 4-pole DC generator runs at 1500 rpm. The frequency of current in the armature winding is:
100 Hz.
25 Hz.
Zero Hz.
50 Hz.
100 Hz.
25 Hz.
Zero Hz.
50 Hz.
Answer
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Electrical Machines
The armature voltage control is considered suitable for a DC motor driven at constant
power.
speed.
current.
torque.
power.
speed.
current.
torque.
Answer
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