Electrical Machines What are slot wedges in a DC machine made of? Mild steel. Cast iron. Fibre. Silicon steel. Mild steel. Cast iron. Fibre. Silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for increase efficiency reduce losses convert AC armature current in to DC collecting of current increase efficiency reduce losses convert AC armature current in to DC collecting of current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a DC series motor is Proportional to the square of the armature current. Proportional to field current. Proportional to the armature current. Inversely proportional to the armature current. Proportional to the square of the armature current. Proportional to field current. Proportional to the armature current. Inversely proportional to the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2 A armature current at no-load, when the armature current is changed to 20 A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? 1037.5 r.p.m. 1130 r.p.m. 4575.4 r.p.m. none of above. 1037.5 r.p.m. 1130 r.p.m. 4575.4 r.p.m. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum efficiency will occur, when copper loss is_______to iron loss? greater than any of the above less than equal to greater than any of the above less than equal to ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which DC motor will have least percentage increase of input current, for the same percentage increase in the torque DC Shunt Motor Separately Excited DC Motor Compound Wound DC Motor DC Series Motor DC Shunt Motor Separately Excited DC Motor Compound Wound DC Motor DC Series Motor ANSWER DOWNLOAD EXAMIANS APP
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