Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 230 V 200 V 115 V 460 V 230 V 200 V 115 V 460 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In V/f speed control of 3-phase induction motor, with increase in frequency, the slip at which maximum torque occurs None of these increase. either of these. decrease. None of these increase. either of these. decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-φ alternator has negligible stator resistance. A short circuit test is conducted on this alternator. At a particular speed, a field current of If1 is required to drive the rated armature current. If the speed of the alternator is reduced to half, the field current required to maintain rated armature current Cannot be predicted due to insufficient data. Woud be equal to 2If1. Would be equal to If1. Would be equal to If1/2. Cannot be predicted due to insufficient data. Woud be equal to 2If1. Would be equal to If1. Would be equal to If1/2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 1 Hz 0 Hz 50 Hz 5 Hz 1 Hz 0 Hz 50 Hz 5 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In above question, the output power delivered by generator G1 and G2 will be 9.3 kW, 9.3 kW. 6.3 kW, 9.3 kW. 5.7 kW, 8.7 kW. 9.6 kW, 12 kW. 9.3 kW, 9.3 kW. 6.3 kW, 9.3 kW. 5.7 kW, 8.7 kW. 9.6 kW, 12 kW. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For power factor improvement the synchronous motor is to be lightly loaded and over excited lightly loaded and underecited heavily loaded and underexcited heavily loaded and over excited lightly loaded and over excited lightly loaded and underecited heavily loaded and underexcited heavily loaded and over excited ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS