Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at leading power factor. unity power factor. lagging power factor. any of the above. leading power factor. unity power factor. lagging power factor. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For power factor improvement the synchronous motor is to be heavily loaded and over excited heavily loaded and underexcited lightly loaded and underecited lightly loaded and over excited heavily loaded and over excited heavily loaded and underexcited lightly loaded and underecited lightly loaded and over excited ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an ideal DC generator the regulation is zero. positive. high. low. zero. positive. high. low. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor must started on no load because it would Run at dangerously high speed. Fail to start without load. Draw more current without producing sufficient torque. Not develop starting torque. Run at dangerously high speed. Fail to start without load. Draw more current without producing sufficient torque. Not develop starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/3000. PN/120. PN/2. PN/60. PN/3000. PN/120. PN/2. PN/60. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During hunting of a synchronous motor negative phase sequence currents are generated. field excitation increases. damper bar develops torque. harmonic are developed in the armature circuit. negative phase sequence currents are generated. field excitation increases. damper bar develops torque. harmonic are developed in the armature circuit. ANSWER DOWNLOAD EXAMIANS APP
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