Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Armature current. Field excitaion. Supply voltage. Armature voltage. Armature current. Field excitaion. Supply voltage. Armature voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1080 1000 1203 1200 1080 1000 1203 1200 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load and full load speed of DC mototr are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor? 14.28%. 15.30%. 16.67%. 18.25%. 14.28%. 15.30%. 16.67%. 18.25%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between the yoke and armature is dc machine is kept very small All of these to avoid locking of the armature. to avoid over heating. to achieve a stronger magnetic field. All of these to avoid locking of the armature. to avoid over heating. to achieve a stronger magnetic field. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of single phase induction motor is having the highest power factor at full load ? Split phase type. Capacitor start. Capacitor run type. Shaded pole type. Split phase type. Capacitor start. Capacitor run type. Shaded pole type. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A crusher is equipped with DC shunt motor. Slip ring induction motor. Reluctance motor. Synchronous motor. DC shunt motor. Slip ring induction motor. Reluctance motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
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