Electrical Machines The material used for commutator brushes is mostly mica. carbon. cast iron. copper. mica. carbon. cast iron. copper. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip rings of an induction motors are made of stainless steel. aluminium. carbon. phosphor bronze. stainless steel. aluminium. carbon. phosphor bronze. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In circle diagram for induction motor, diameter of circle represents which of the following ? Line voltage. Slip. Running torque. Rotor current. Line voltage. Slip. Running torque. Rotor current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines 1 KVA, 230 V, 50 Hz, single phase transformer has an eddy current loss of 30 watts. The eddy current loss when the transformer is excited by a dc source of same voltage will be zero watt 30 W less than 30 W more than 30 W zero watt 30 W less than 30 W more than 30 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor electromotive force of the IM is observed to make 100 complete alterations per minute, calculated slip None of these 3 %. 0 .001 %. 3.33 %. None of these 3 %. 0 .001 %. 3.33 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase slip ring induction motor is wound for 4 poles on stator and 6 poles on the rotor. When 3-phase balanced voltage source at 50 Hz is applied, it will run at 750rpm 1000 rpm zero speed 1500 rpm 750rpm 1000 rpm zero speed 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
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