Electrical Machines The emf induced in a conductor rotating in a bipolar field is AC. None of these DC. both of above. AC. None of these DC. both of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is reduced, the power factor is None of these unity power factor leading power factor lagging power factor None of these unity power factor leading power factor lagging power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of a DC motor back emf increases but line current falls. back emf falls and line current increases. both back emf as well as line current fall. both back emf as well as line current increase. back emf increases but line current falls. back emf falls and line current increases. both back emf as well as line current fall. both back emf as well as line current increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit test on transformer gives hysteresis loss both 1and 2 eddy current loss copper loss hysteresis loss both 1and 2 eddy current loss copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor? 30 rpm zero 1500 rpm 1470 rpm 30 rpm zero 1500 rpm 1470 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which method is less recommendable for induction motor starting in the industries? Rotor resistance starting. Direct online starting. Auto transformer starting. Stator resistance starting. Rotor resistance starting. Direct online starting. Auto transformer starting. Stator resistance starting. ANSWER DOWNLOAD EXAMIANS APP
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