Three Phase Induction Motors The frequency of rotor current in a 6-pole , 50 Hz, 3-phase induction motor running at 950 rpm is 0.05 Hz 2.5 Hz 5 Hz 1.5 Hz 0.05 Hz 2.5 Hz 5 Hz 1.5 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors For the same kVA rating, the leakage flux in induction motor is _______ that of transformer. About the same More than None of the listed here Less than About the same More than None of the listed here Less than ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors An induction motor is preferred to a dc motor because it _______ Provides high starting torque Has simple and rugged construction Provides fine speed control None of the listed here Provides high starting torque Has simple and rugged construction Provides fine speed control None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the rotor slots are made deeper, rotor resistance is ______ Increased under running conditions Decreased at starting Increased at starting None of the listed here Increased under running conditions Decreased at starting Increased at starting None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The good power factor of an induction motor can be achieved if the average flux density in the air gap is Small Infinity Absent Large Small Infinity Absent Large ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Slip of an induction motor is negative when None of these Rotor speed is less than the synchronous speed of the field and are in the same direction Rotor speed is more than the synchronous speed of the field and are in the same direction Magnetic field and rotor rotate in opposite direction None of these Rotor speed is less than the synchronous speed of the field and are in the same direction Rotor speed is more than the synchronous speed of the field and are in the same direction Magnetic field and rotor rotate in opposite direction ANSWER DOWNLOAD EXAMIANS APP
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