Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 100 Hz 0 Hz 25 Hz 50 Hz 100 Hz 0 Hz 25 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The condition for maximum running torque is 0.5 lagging unity zero R = S.X 0.707 lagging 0.5 lagging unity zero R = S.X 0.707 lagging ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field connection of a DC Shunt Motor is changed then it will run in same direction by slowly. it will run in opposite direction. motor will not run. it will run in same direction. it will run in same direction by slowly. it will run in opposite direction. motor will not run. it will run in same direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The torque angle, in a synchronous motor, is the angle between the supply voltage and the back emf. the rotating stator flux and rotor flux. magnetizing electric current and back emf. None of these the supply voltage and the back emf. the rotating stator flux and rotor flux. magnetizing electric current and back emf. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main purpose of providing tertiary winding in a three phase transformer is None of these to carry extra load. to interconnect three voltage systems. to suppress harmonic and unbalance in voltage. None of these to carry extra load. to interconnect three voltage systems. to suppress harmonic and unbalance in voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator? Induced emf. Can not be determined. Mechanical power. Armature current. Induced emf. Can not be determined. Mechanical power. Armature current. ANSWER DOWNLOAD EXAMIANS APP
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