Electrical Machines In a transformer zero voltage regulation is achieved at a load power factor which is lagging zero unity leading lagging zero unity leading ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss None of these remains constant. decrease. increase. None of these remains constant. decrease. increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 12 pole triplex lap wound DC armature, each conductor can carry current of 100 A. The rated current of this armature is 600 A. 3600 A. 2400 A. 1200 A. 600 A. 3600 A. 2400 A. 1200 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate with fall of terminal voltage. deteriorate with rise in terminal voltage. improve with fall of terminal voltage. improve with rise in terminal voltage. deteriorate with fall of terminal voltage. deteriorate with rise in terminal voltage. improve with fall of terminal voltage. improve with rise in terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The torque angle, in a synchronous motor, is the angle between the supply voltage and the back emf. magnetizing electric current and back emf. None of these the rotating stator flux and rotor flux. the supply voltage and the back emf. magnetizing electric current and back emf. None of these the rotating stator flux and rotor flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Motors for fans and pumps are selected in the rpm range 375 to 500. 1440 to 2880. 500 to 720. 720 to 920. 375 to 500. 1440 to 2880. 500 to 720. 720 to 920. ANSWER DOWNLOAD EXAMIANS APP
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