Electrical Machines In DC generators, the residual magnetism is of the order of 20 %. 2.5 %. 15 %. 10 %. 20 %. 2.5 %. 15 %. 10 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Armature current. Field excitaion. Armature voltage. Supply voltage. Armature current. Field excitaion. Armature voltage. Supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the phase difference between two windings of A.C servomotor ? 120°. 90°. 60°. 30°. 120°. 90°. 60°. 30°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To eliminate the 5th harmonic in the induced voltages their respective pitch factor angle should be 36° 18° 30° 72° 36° 18° 30° 72° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the space waveform of the air-gap flux distribution affects neither the voltage nor the torque voltage but not the torque both the torque and voltage torque but not the voltage neither the voltage nor the torque voltage but not the torque both the torque and voltage torque but not the voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC motors are stopped by opening line switches and not by forcing the handle of the motor starter back to OFF position. This is due to occurance of None of these. Both of above. Heavy sparking at brushes. Heavy sparking at the first stud of starting resistance steps. None of these. Both of above. Heavy sparking at brushes. Heavy sparking at the first stud of starting resistance steps. ANSWER DOWNLOAD EXAMIANS APP
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