DC Motors The speed of a dc motor can be controlled by changing Armature circuit resistance Aplied voltage All of the listed here Is flux Armature circuit resistance Aplied voltage All of the listed here Is flux 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 25% of the previous value 100% of the previous value 10% of the previous value 50% of the previous value 25% of the previous value 100% of the previous value 10% of the previous value 50% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc compound machine, Either can play dominant role Both play equally dominant role Series field winding plays dominant role Shunt field winding plays dominant role Either can play dominant role Both play equally dominant role Series field winding plays dominant role Shunt field winding plays dominant role ANSWER DOWNLOAD EXAMIANS APP
DC Motors In variable speed motor Same commutating field is needed at low speed than at high speed A stronger commutating field is needed at low speed than at high speed None of these A weaker commutating field is needed at low speed than at high speed Same commutating field is needed at low speed than at high speed A stronger commutating field is needed at low speed than at high speed None of these A weaker commutating field is needed at low speed than at high speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Aids the armature current Aids the applied voltage None of the listed here Opposes the applied voltage Aids the armature current Aids the applied voltage None of the listed here Opposes the applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Copper losses Hysteresis losses Eddy current losses Windage losses Copper losses Hysteresis losses Eddy current losses Windage losses ANSWER DOWNLOAD EXAMIANS APP
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