DC Motors The value of back emf in dc motor is maximum at Half full load None of the listed here Full load No load Half full load None of the listed here Full load No load ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following can be used for controlling the speed of a dc motor? Thyratron Transistor Thermistor Thyristor Thyratron Transistor Thermistor Thyristor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors? Stability Low cost Wide speed range High starting torque Stability Low cost Wide speed range High starting torque ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor, the brushes are shifted from the mechanical neutral plane in a direction opposite to the rotation to _____ Produce flat characteristics Decrease speed Reduce sparking Increase speed Produce flat characteristics Decrease speed Reduce sparking Increase speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 60 to 70 % Less than 50% 100 % 80 to 90 % 60 to 70 % Less than 50% 100 % 80 to 90 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature voltage control of dc motor provides Constant torque drive None of the listed here Constant voltage drive Constant current drive Constant torque drive None of the listed here Constant voltage drive Constant current drive ANSWER DOWNLOAD EXAMIANS APP
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