DC Motors In the dc motor the iron losses occur in Armature Field Commutator Brushes Armature Field Commutator Brushes ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a dc motor is comnected across the AC supply it will Not run Run at lower speed Run at normal speed Burn due to heat produced in the field winding by eddy currents Not run Run at lower speed Run at normal speed Burn due to heat produced in the field winding by eddy currents ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is High maintenance cost High initial cost Low efficiency at high loads All of these High maintenance cost High initial cost Low efficiency at high loads All of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors The value of back emf in dc motor is maximum at None of the listed here Full load Half full load No load None of the listed here Full load Half full load No load ANSWER DOWNLOAD EXAMIANS APP
DC Motors ______ motors never use belt connected loads. Series Differentially compounded Cummulative compounded Shunt Series Differentially compounded Cummulative compounded Shunt 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 resistance is connected in series with armature A high value resistor is connected across the field winding Armature is temporarily open circuited A resistance is connected parallel to the armature A resistance is connected in series with armature A high value resistor is connected across the field winding Armature is temporarily open circuited A resistance is connected parallel to the armature ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS