Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is 3Fmax. (1/2)Fmax. (3/2)Fmax. Fmax. 3Fmax. (1/2)Fmax. (3/2)Fmax. Fmax. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has the highest power factor at full load? Shaded pole Resistance split phase Capacitor run Capacitor start Shaded pole Resistance split phase Capacitor run Capacitor start ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Counter emf of a DC motor aids applied voltage. regulates its armature voltage. helps in energy conversion. exceeds supply voltage aids applied voltage. regulates its armature voltage. helps in energy conversion. exceeds supply voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC Shunt Motor if the load current increases keeping the terminal voltage constant, then flux will any of the above. remain constant. increase. decrease. any of the above. remain constant. increase. decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field of a dc shunt motor gets opened while the motor is running, then the armature current will drop motor will become slow. motor will attain dangerously high speed armature will oscillate about original speed as the mean speed armature current will drop motor will become slow. motor will attain dangerously high speed armature will oscillate about original speed as the mean speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The noise resulting from vibrations of lamination set by magnetic forces, is termed as zoom. boo. magnetostriction. hum. zoom. boo. magnetostriction. hum. ANSWER DOWNLOAD EXAMIANS APP
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