Electrical Machines A 4 pole DC generator runs at 750 rpm and generate an emf of 240 V. The armature is wave wound and has 792 conductors. If the total flux from each pole is 0.0145 Wb. What is the leakage co-efficient? 1.4. 1.2. 1.8. 1.5. 1.4. 1.2. 1.8. 1.5. 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 Would be equal to If1/2. Would be equal to If1. Cannot be predicted due to insufficient data. Woud be equal to 2If1. Would be equal to If1/2. Would be equal to If1. Cannot be predicted due to insufficient data. Woud be equal to 2If1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance field winding will burn. machine will generate maximum voltage. the voltage generated will be zero. machine will generate maximum power. field winding will burn. machine will generate maximum voltage. the voltage generated will be zero. machine will generate maximum power. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Reactive power generated or delivered significantly depends on both 1 and 2. frequency. excitation. load angle. both 1 and 2. frequency. excitation. load angle. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3-phase, 4 pole, 50 Hz synchronous motor the frequency, pole number and the frequency are halved. The motor speed will be 3000 rpm 375 rpm 75 rpm 1500 rpm 3000 rpm 375 rpm 75 rpm 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A frog leg winding is used in a DC machine to eliminate the use equalizer in lap winding. the use of compensating winding. reactance voltage produced due to communication. the use drum winding. the use equalizer in lap winding. the use of compensating winding. reactance voltage produced due to communication. the use drum winding. ANSWER DOWNLOAD EXAMIANS APP
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