Electrical Machines In DC generator on no-load, the air gap flux distribution in space is sinusoidal. triangular. pulsating. flat topped. sinusoidal. triangular. pulsating. flat topped. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine torque depends on which of the following? speed both A and B armature current (I) flux (φ) speed both A and B armature current (I) flux (φ) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Direct-on-line (DOL) starters are not suitable for starting large DC motors, because the motor may run away. the starting torque becomes low. the motor may not start. the starting current will be enormously high. the motor may run away. the starting torque becomes low. the motor may not start. the starting current will be enormously high. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor drawing an armature current of Ia is operating under saturated magnetic conditions. The torque developed in the motor is proportional to Ia2 Ia 1/Ia I/Ia2 Ia2 Ia 1/Ia I/Ia2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 50 Hz 0 Hz 100 Hz 25 Hz 50 Hz 0 Hz 100 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC motor, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate and the speed rises. deteriorate and the speed falls. improve and the speed rises. improve and the speed falls. deteriorate and the speed rises. deteriorate and the speed falls. improve and the speed rises. improve and the speed falls. ANSWER DOWNLOAD EXAMIANS APP
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