DC Motors Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors? Wide speed range Stability High starting torque Low cost Wide speed range Stability High starting torque Low cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor constant torque is produced due to Commutator End plates Rotor laminations Pole shoes Commutator End plates Rotor laminations Pole shoes ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? None of these Armature copper loss Field copper loss Windage loss None of these Armature copper loss Field copper loss Windage loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc machines the residual magnetism is of the order of 2 to 3 percent 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 ANSWER DOWNLOAD EXAMIANS APP
DC Motors A series motor will over speed when The load is increase Load is removed The armature circuit is opened. The field is opened The load is increase Load is removed The armature circuit is opened. The field is opened ANSWER DOWNLOAD EXAMIANS APP
DC Motors In variable speed motor 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 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 ANSWER DOWNLOAD EXAMIANS APP
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