Electrical Machines Induction motors provided with open slots have higher efficiency. leading power factor. less breakdown torque. more breakdown torque. higher efficiency. leading power factor. less breakdown torque. more breakdown torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss? 40W 60W 100W 80W 40W 60W 100W 80W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series 76.91 V. 56.91 V. 66.91 V. 86.91 V. 76.91 V. 56.91 V. 66.91 V. 86.91 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of these types of motor is used in elevators? None of these. DC shunt motor. DC compound motor. DC series motor. None of these. DC shunt motor. DC compound motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum efficiency will occur, when copper loss is_______to iron loss? greater than any of the above equal to less than greater than any of the above equal to less than ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor Increase. Remains same. None of these. Decrease. Increase. Remains same. None of these. Decrease. ANSWER DOWNLOAD EXAMIANS APP
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