DC Motors The back emf in a dc motor ______ Aids the armature current None of the listed here Aids the applied voltage Opposes the applied voltage Aids the armature current None of the listed here Aids the applied voltage Opposes the applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 10% of the previous value 50% of the previous value 100% of the previous value 25% of the previous value 10% of the previous value 50% of the previous value 100% of the previous value 25% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils ANSWER DOWNLOAD EXAMIANS APP
DC Motors ______ motor has the best speed regulation. Cummulative compounded Series Shunt Differentially compounded Cummulative compounded Series Shunt Differentially compounded ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating winding is basically used in a dc machine None of the listed here To improve commutation To control the speed of machine To reduce armature reaction None of the listed here To improve commutation To control the speed of machine To reduce armature reaction ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following application requires high starting torque? Locomotive Air blower Centrifugal pump Lathe machine Locomotive Air blower Centrifugal pump Lathe machine ANSWER DOWNLOAD EXAMIANS APP
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