Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor Increase. Remains same. None of these. Decrease. Increase. Remains same. None of these. Decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine torque is proportional to which of the following? None of these armature current(Ia) flux(φ) both A and B None of these armature current(Ia) flux(φ) both A and B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is not suitable for frequent starting and stopping? Capacitor split phase motor Resistance split phase motor All of these Capacitor run motor Capacitor split phase motor Resistance split phase motor All of these Capacitor run motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 16.67%. 14.28%. 15.30%. 18.25%. 16.67%. 14.28%. 15.30%. 18.25%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at unity power factor. leading power factor. lagging power factor. any of the above. unity power factor. leading power factor. lagging power factor. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stability of a synchronous motor ---------- with the increase in excitation. decreases remains unaffected increases any of the above decreases remains unaffected increases any of the above ANSWER DOWNLOAD EXAMIANS APP
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