Electrical Machines In a 3 - Φ induction motor none of them. power factor at starting in the same as that while running. power factor at starting is high as compared to that while running. power factor at starting is low as compared to that while running. none of them. power factor at starting in the same as that while running. power factor at starting is high as compared to that while running. power factor at starting is low as compared to that while running. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is 1, 4 2, 3 2, 4 1, 3 1, 4 2, 3 2, 4 1, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the space waveform of the air-gap flux distribution affects voltage but not the torque torque but not the voltage neither the voltage nor the torque both the torque and voltage voltage but not the torque torque but not the voltage neither the voltage nor the torque both the torque and voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loss will depends on f³ f1.6 f² f f³ f1.6 f² f ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field divertor resistance for a DC series motor is of order of 10 Ω 100 Ω 0.1 Ω 50 Ω 10 Ω 100 Ω 0.1 Ω 50 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two 3-phase AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air-gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductor/slot in a big generator is K times that of the smaller one. The value of K to get equal no load voltage at same frequency is 1/4. 1/2. 8. 4. 1/4. 1/2. 8. 4. ANSWER DOWNLOAD EXAMIANS APP
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