Electrical Machines For a 3 - Φ, 4 pole, 50 Hz IM rotating at full load speed of 1440 rpm, calculate speed of rotor field with respect to rotor structure and stator structure respectively? 60, 1440. 1440, 1500. 60, 1500. 50, 1500. 60, 1440. 1440, 1500. 60, 1500. 50, 1500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The reduced air gap results in an increase starting torque. power factor. cost of operation. breaking torque. starting torque. power factor. cost of operation. breaking torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Star - delta method of starting of motor is not possible in case of high speed motor. low horse power motor. high torque motor. single phase induction motor. high speed motor. low horse power motor. high torque motor. single phase induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss None of these remains constant. increase. decrease. None of these remains constant. increase. decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage regulation of transformer is given by (V2 - E2) / E2 (V2 - E2) / V2 (E2 - V2) / V2 (E2 - V2) / E2 (V2 - E2) / E2 (V2 - E2) / V2 (E2 - V2) / V2 (E2 - V2) / E2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at lagging power factor. leading power factor. any of the above. unity power factor. lagging power factor. leading power factor. any of the above. unity power factor. ANSWER DOWNLOAD EXAMIANS APP