Electrical Machines Field weakening control method is used for the _________ ? above rated speed below rated speed both A and B None of these above rated speed below rated speed both A and B None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing commutator with large number of segments. carbon brushes. equalizer rings. graphite brushes. commutator with large number of segments. carbon brushes. equalizer rings. graphite brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Rotating magnetic field is produced in an induction motor because of either stator winding or rotor winding. stator winding. rotor winding. None of these either stator winding or rotor winding. stator winding. rotor winding. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the commutator pitch? Number of conductors spanned by one coil at the back end of the armature. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the back end of the armature. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. Number of commutator segments between two successive coils. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor must started on no load because it would Not develop starting torque. Run at dangerously high speed. Draw more current without producing sufficient torque. Fail to start without load. Not develop starting torque. Run at dangerously high speed. Draw more current without producing sufficient torque. Fail to start without load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines High starting torque and low starting current is the advantage of stepper motor. hysteresis motor. slip ring induction motor. squirrel cage induction motor. stepper motor. hysteresis motor. slip ring induction motor. squirrel cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
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