DC Motors Carbon brushes are preferable to copper brushes because _____ They have lower resistance They reduce sparking They reduce armature reaction They have longer life They have lower resistance They reduce sparking They reduce armature reaction They have longer life ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a _____ motor is practically constant. Shunt Series Differentially compounded Cumulatively compounded Shunt Series Differentially compounded Cumulatively compounded ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Opposes the applied voltage None of the listed here Aids the armature current Aids the applied voltage Opposes the applied voltage None of the listed here Aids the armature current Aids the applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors The value of back emf in dc motor is maximum at No load None of the listed here Half full load Full load No load None of the listed here Half full load Full load ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc motor is still used in industrial applications because it None of the listed here Is simple in construction Provides fine speed control Is cheap None of the listed here Is simple in construction Provides fine speed control Is cheap ANSWER DOWNLOAD EXAMIANS APP
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