DC Motors The speed of a _____ motor is practically constant. Series Differentially compounded Shunt Cumulatively compounded Series Differentially compounded Shunt Cumulatively compounded ANSWER DOWNLOAD EXAMIANS APP
DC Motors The mechanical power developed in a dc motor is maximum when back emf is equal to _____ the applied voltage. Half None of the listed here One-third Twice Half None of the listed here One-third Twice ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? Field copper loss Windage loss None of these Armature copper loss Field copper loss Windage loss None of these Armature copper loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is Low efficiency at high loads All of these High maintenance cost High initial cost Low efficiency at high loads All of these High maintenance cost High initial cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Aids the armature current Opposes the applied voltage Aids the applied voltage None of the listed here Aids the armature current Opposes the applied voltage Aids the applied voltage None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors For a D.C. shunt motor if the excitation is changed Torque and power both will change Torque, power and speed, all will change Torque will change but power will remain constant Torque will remain constant Torque and power both will change Torque, power and speed, all will change Torque will change but power will remain constant Torque will remain constant ANSWER DOWNLOAD EXAMIANS APP
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