Electrical Machines Induction motor operation depends on stationary magnetic field. either of these. rotating magnetic field. None of these stationary magnetic field. either of these. rotating magnetic field. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following type of brush and their application is/are correct carbon brush → normal ratings copper graphite → low voltage high current density All of these electro graphite → large ratings carbon brush → normal ratings copper graphite → low voltage high current density All of these electro graphite → large ratings ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous generator with constant steam input supplies power to an infinite bus at a lagging power factor. If the excitation is increased both power angle and power factor decrease both power angle and power factor increase power angle decrease and power factor increase power angle increase and power factor decrease both power angle and power factor decrease both power angle and power factor increase power angle decrease and power factor increase power angle increase and power factor decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In large sized DC machines the compensating windings are provided to neutralize voltage induced in coil due to fluctuation of l None of these compensate for the decrease in speed due to increase of load. reduce eddy current losses by providing local short circuits. neutralize voltage induced in coil due to fluctuation of l None of these compensate for the decrease in speed due to increase of load. reduce eddy current losses by providing local short circuits. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor, the damper winding is generally used to reduce noise level only. prevent hunting and provide the starting torque. reduce the eddy currents. provide starting torque only. reduce noise level only. prevent hunting and provide the starting torque. reduce the eddy currents. provide starting torque only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate with fall of terminal voltage. deteriorate with rise in terminal voltage. improve with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with fall of terminal voltage. deteriorate with rise in terminal voltage. improve with rise in terminal voltage. improve with fall of terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS