Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Unity power factor. Zero power factor. Leading power factor. Lagging power factor. Unity power factor. Zero power factor. Leading power factor. Lagging power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc motors, under leading pole tips flux density will--------? None of these decrease either increase or decrease increase None of these decrease either increase or decrease increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slip of an induction motor normally does not depend on which of the following? Synchronous speed. Shaft torque. Core loss component. Rotor speed. Synchronous speed. Shaft torque. Core loss component. Rotor speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Wave winding is employed in DC machine of high current and low voltage rating. low current and low voltage rating. high current and low voltage rating. low current and high voltage rating. high current and low voltage rating. low current and low voltage rating. high current and low voltage rating. low current and high voltage rating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is Ns S.Ns Nr Zero Ns S.Ns Nr Zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is zero 50 V 40 V 20 V zero 50 V 40 V 20 V ANSWER DOWNLOAD EXAMIANS APP
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