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