Electrical Machines What is power factor of a 3 - φ induction motor at no load? Equal to 1. Low. Same as full load. High. Equal to 1. Low. Same as full load. High. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - φ induction motor running at full load which of these parameters is stationary with respect to the stator mmf wave? Rotor winding. Both rotor and stator winding. Rotor mmf wave. Stator winding. Rotor winding. Both rotor and stator winding. Rotor mmf wave. Stator winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Silicon content in steel lamination is kept within 5% as it All of these makes the material brittle. increases hysteresis loss. Increases cost. All of these makes the material brittle. increases hysteresis loss. Increases cost. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/60. PN/2. PN/3000. PN/120. PN/60. PN/2. PN/3000. PN/120. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at any of the above. lagging power factor. leading power factor. unity power factor. any of the above. lagging power factor. leading power factor. unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A slip ring Induction motor runs at 290 rpm at full load, when connected to 50 Hz supply. Determine the number of poles and slip. P = 50, s = 4.43 %. P = 40, s = 5.79 %. P = 20, s = 3.33 %. P = 60, s = 0.96 %. P = 50, s = 4.43 %. P = 40, s = 5.79 %. P = 20, s = 3.33 %. P = 60, s = 0.96 %. ANSWER DOWNLOAD EXAMIANS APP
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