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Electrical Machines
A 4-pole DC generator runs at 1500 rpm. The frequency of current in the armature winding is:
Zero Hz.
50 Hz.
100 Hz.
25 Hz.
Zero Hz.
50 Hz.
100 Hz.
25 Hz.
Answer
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Related Question
Electrical Machines
In double cage induction motor, the inner cage offers
low resistance and low reactance.
low resistance and high reactance.
high resistance and high reactance.
high resistance and low reactance.
low resistance and low reactance.
low resistance and high reactance.
high resistance and high reactance.
high resistance and low reactance.
Answer
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Electrical Machines
A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is
5%
25%
2%
4%
5%
25%
2%
4%
Answer
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Electrical Machines
The coil spam
can never be equal to pole pitch.
must be exactly equal to people pitch.
none of above.
may or may not be exactly equal to people pitch.
can never be equal to pole pitch.
must be exactly equal to people pitch.
none of above.
may or may not be exactly equal to people pitch.
Answer
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Electrical Machines
Eb/V ratio of a DC motor is an indication of
Running Torque.
Starting torque.
Effiency.
Speed regulation.
Running Torque.
Starting torque.
Effiency.
Speed regulation.
Answer
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Electrical Machines
In DC machine, the armature windings are placed on the rotor because of necessity for
development of torque.
generation of voltage.
electromechanical energy conversion.
commutation.
development of torque.
generation of voltage.
electromechanical energy conversion.
commutation.
Answer
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