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Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of
less than 90o.
Greater than 90o.
90o.
0o.
less than 90o.
Greater than 90o.
90o.
0o.
Answer
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Related Question
Electrical Machines
In a DC generator sparking between brushes and commutator surface may be due to
under commutation.
over commutation.
too rapid reversal of current.
any of the above.
under commutation.
over commutation.
too rapid reversal of current.
any of the above.
Answer
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Electrical Machines
When an electric train is moving down a hill, the DC motor will operate as
DC series generator.
DC shunt motor.
DC shunt generator.
DC series motor.
DC series generator.
DC shunt motor.
DC shunt generator.
DC series motor.
Answer
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Electrical Machines
Which of the following motor used in hair dryers?
Synchronous motors.
Cage induction motor.
Shaded pole IM.
Split phase IM.
Synchronous motors.
Cage induction motor.
Shaded pole IM.
Split phase IM.
Answer
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Electrical Machines
In DC generator, full form of MNA is what?
Magnetic neutral axis.
Magnetically no-load armature co-ordinate.
Magnetic neutral armature co-ordinate.
Magnetic no-load axis.
Magnetic neutral axis.
Magnetically no-load armature co-ordinate.
Magnetic neutral armature co-ordinate.
Magnetic no-load axis.
Answer
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Electrical Machines
The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease?
40%
5%
10%
19%
40%
5%
10%
19%
Answer
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