Electrical Machines In an induction motor, what is the ratio of rotor input to rotor copper loss? 1-S S 1/(1-S) 1/S 1-S S 1/(1-S) 1/S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward-Leonard system for controlling the speed of a DC motor is used where The speed in both the direction is required. The accuracy in speed control is required. Very fine speed control over the whole range from zero to normal speed is required. All of above. The speed in both the direction is required. The accuracy in speed control is required. Very fine speed control over the whole range from zero to normal speed is required. All of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an alternator the voltage generated per phase is proportional to flux per pole. All of these frequency of waveform. number of turns in coil. flux per pole. All of these frequency of waveform. number of turns in coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine torque depends on which of the following? both A and B armature current (I) flux (φ) speed both A and B armature current (I) flux (φ) speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a practical synchronous motor the pull out torque will occur when the torque angle is nearly equal to 30°. 45°. 75°. 0°. 30°. 45°. 75°. 0°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which method is less recommendable for induction motor starting in the industries? Auto transformer starting. Stator resistance starting. Rotor resistance starting. Direct online starting. Auto transformer starting. Stator resistance starting. Rotor resistance starting. Direct online starting. ANSWER DOWNLOAD EXAMIANS APP
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