DC Motors The back emf in a dc motor ______ Aids the applied voltage Aids the armature current Opposes the applied voltage None of the listed here Aids the applied voltage Aids the armature current Opposes the applied voltage None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors The value of back emf in dc motor is maximum at None of the listed here Half full load Full load No load None of the listed here Half full load Full load No load ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc machines the residual magnetism is of the order of 50 to 75 percent 20 to 25 percent 10 to 15 percent 2 to 3 percent 50 to 75 percent 20 to 25 percent 10 to 15 percent 2 to 3 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking None of these Dynamic braking Plugging Regenerative None of these Dynamic braking Plugging Regenerative ANSWER DOWNLOAD EXAMIANS APP
DC Motors ______ motor has the best speed regulation. Series Differentially compounded Shunt Cummulative compounded Series Differentially compounded Shunt Cummulative compounded ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following in a dc motor, can sustain the maximum temperature rise? Armature winding Slip rings Commutator Field winding Armature winding Slip rings Commutator Field winding ANSWER DOWNLOAD EXAMIANS APP
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