Electrical Machines In which of the following DC Motor the ratio of starting torque to full load torque is minimum? Cumulative compound motor. Differential compound motor. Shunt motor. Series motor. Cumulative compound motor. Differential compound motor. Shunt motor. Series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In speed control of DC Series motor, speed lower than the rated speed can be obtained by Connecting an additional resistance in stator circuit. Connecting an additional resistance in the field circuit. Connecting an additional resistance in the armature circuit. Any of the above. Connecting an additional resistance in stator circuit. Connecting an additional resistance in the field circuit. Connecting an additional resistance in the armature circuit. Any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Armature voltage. Field excitaion. Armature current. Supply voltage. Armature voltage. Field excitaion. Armature current. Supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature voltage control is considered suitable for a DC motor driven at constant speed. torque. current. power. speed. torque. current. power. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are poor overall efficiency. high maintenance cost. high initial cost. all of above. poor overall efficiency. high maintenance cost. high initial cost. all of above. ANSWER DOWNLOAD EXAMIANS APP
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