Electrical Machines A 500 V, 120 KW, 50 Hz, star connected synchronous motor operating at 0.8 power factor leading has full load efficiency of 91%. The armature resistance is equal to 0.08Ω. The magnitude of armature current is nearly equal to 190 A. 173 A. 127 A. 240 A. 190 A. 173 A. 127 A. 240 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 50 Hz 5 Hz 1 Hz 0 Hz 50 Hz 5 Hz 1 Hz 0 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the methods to reduce the armature reaction and its effects? pole stacking All of these pole chamfering compensating winding pole stacking All of these pole chamfering compensating winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 6 pole, 50 Hz IM has a rotor speed of 987 rpm find rotor frequency? 0.65 Hz. 60 Hz. 0.75 Hz. 0.70 Hz. 0.65 Hz. 60 Hz. 0.75 Hz. 0.70 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When an electric train is moving down a hill, the DC motor will operate as DC series generator. DC shunt motor. DC series motor. DC shunt generator. DC series generator. DC shunt motor. DC series motor. DC shunt generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An ideal synchronous motor has no starting torque because relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor winding is highly reactive. rotor is made up of salient poles. relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor winding is highly reactive. rotor is made up of salient poles. ANSWER DOWNLOAD EXAMIANS APP
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