Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is lagging. leading. unity. zero. lagging. leading. unity. zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as T is independent of P. T ∝ √P. T ∝ P. T2 ∝ P3. T is independent of P. T ∝ √P. T ∝ P. T2 ∝ P3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, the demagnetizing effect of armature reaction is due to uneven air-gap length non-sinusoidal nature of armature mmf component of armature mmf along field axis magnetic saturation in half of the field pole uneven air-gap length non-sinusoidal nature of armature mmf component of armature mmf along field axis magnetic saturation in half of the field pole ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree? 30. 45. 270. 180. 30. 45. 270. 180. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 440 V, 3-phase, 10 pole and 50 HZ synchronous motor delivering a torque of 50 N-m, delivers a power of 100W 3000W 1000W 500W 100W 3000W 1000W 500W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The torque angle, in a synchronous motor, is the angle between magnetizing electric current and back emf. the supply voltage and the back emf. None of these the rotating stator flux and rotor flux. magnetizing electric current and back emf. the supply voltage and the back emf. None of these the rotating stator flux and rotor flux. ANSWER DOWNLOAD EXAMIANS APP
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