Electrical Machines A 4 pole dc generator is running at 1500 rpm the frequency of current in the armature winding is 50Hz. 150Hz. 100Hz. 200Hz. 50Hz. 150Hz. 100Hz. 200Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the cause of rapid brush wear may be any of above. severe sparking. rough commutator surface. imperfect contact. any of above. severe sparking. rough commutator surface. imperfect contact. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The volt-ampere euation for a long-shunt compound motor is given by Vt= Ea + Iara Vt= Ea– Iara Vt = Ea + Ia(ra + rs) Vt = Ea + Iara+ ILrs Vt= Ea + Iara Vt= Ea– Iara Vt = Ea + Ia(ra + rs) Vt = Ea + Iara+ ILrs ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A? 10% 11% 41% 21% 10% 11% 41% 21% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors has low ratings only? Capacitor start Resistance split phase Capacitor run Shaded pole Capacitor start Resistance split phase Capacitor run Shaded pole ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 8 pole, 50 Hz single phase induction motor is running at 690 rpm. Its slip with respect to forward field is -1.92 -0.08 1.92 0.08 -1.92 -0.08 1.92 0.08 ANSWER DOWNLOAD EXAMIANS APP
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