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? 1470 rpm zero 30 rpm 1500 rpm 1470 rpm zero 30 rpm 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Pole changing methods are suitable only for ___________ type induction motor. none of these. linear. wound. cage. none of these. linear. wound. cage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a 50 Hz three phase induction motor under full load condition is 725 rpm the number of poles of the motor are ______________. 2. 8. 6. 4. 2. 8. 6. 4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Where the shunt generators are widely used? Where voltage variation is needed over a wide load range. Where often load fluctuation is occurred. Where the load is very high. Where a constant voltage is required over a narrow load range. Where voltage variation is needed over a wide load range. Where often load fluctuation is occurred. Where the load is very high. Where a constant voltage is required over a narrow load range. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have more starting torque. smoother acceleration. more starting time. reduced starting current. more starting torque. smoother acceleration. more starting time. reduced starting current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous speed of an induction motor will be increased by increasing of frequency. increasing number of poles. decreasing of frequency. speed can not be increased. increasing of frequency. increasing number of poles. decreasing of frequency. speed can not be increased. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS