Electrical Machines Field weakening control method is used for the _________ ? None of these below rated speed above rated speed both A and B None of these below rated speed above rated speed both A and B 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. Number of conductors spanned by one coil at the front end of the armature. Number of commutator segments between two successive coils. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the back end of the armature. Number of conductors spanned by one coil at the front end of the armature. Number of commutator segments between two successive coils. The distance between the staring of first coil and its next successive coil ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The damper windings also called the squirrel cage windings or damper grids are provided in a synchronous motor to make it self starting. both (A) and (B). consists of short-circuited copper bars embedded in the field pole faces. are provided on the stator for improving power factor. are provided in a synchronous motor to make it self starting. both (A) and (B). consists of short-circuited copper bars embedded in the field pole faces. are provided on the stator for improving power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the supply terminal of a DC shunt motor are interchanged The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. The direction of rotation will reverse. The motor will stop. The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. The direction of rotation will reverse. The motor will stop. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two identical loss less series motors connected in series across a dc supply voltage, runs at speed of N1 and N2, then ratio of their output power is none. 1 : 1. N12 : N22. N1 : N2. none. 1 : 1. N12 : N22. N1 : N2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor electromotive force of the IM is observed to make 100 complete alterations per minute, calculated slip 3.33 %. None of these 3 %. 0 .001 %. 3.33 %. None of these 3 %. 0 .001 %. ANSWER DOWNLOAD EXAMIANS APP
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