DC Motors The shaft torque in a dc motor is less than total armature torque because of ______ in the motor. None of the listed here Cu losses Field losses Iron and friction losses None of the listed here Cu losses Field losses Iron and friction losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 100 % Less than 50% 80 to 90 % 60 to 70 % 100 % Less than 50% 80 to 90 % 60 to 70 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit A high value resistor is connected across the field winding A resistance is connected parallel to the armature A resistance is connected in series with armature Armature is temporarily open circuited A high value resistor is connected across the field winding A resistance is connected parallel to the armature A resistance is connected in series with armature Armature is temporarily open circuited ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc motor can be easily identified by Winding Commutator Size of conductor Yoke Winding Commutator Size of conductor Yoke 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. None of the listed here Twice One-third Half None of the listed here Twice One-third Half ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which motor should be used for centrifugal pumps? Series motor Shunt motor Either series or shunt None of the listed here Series motor Shunt motor Either series or shunt None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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