Three Phase Induction Motors The magnetising current drawn by a 3 phase induction motor is about _______ of full load stator current. 30 to 50% 15 to 20 % 10 to 15% 5% 30 to 50% 15 to 20 % 10 to 15% 5% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage induction motor, the number of rotor bars is generally ________ None of the listed here Prime number Even number Equal to stator poles None of the listed here Prime number Even number Equal to stator poles ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______ None of the listed here 65% 90% 40% None of the listed here 65% 90% 40% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A 3 phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is _______ 200 W 500 W 20 W 980 W 200 W 500 W 20 W 980 W ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The maximum torque of a 3-phase induction motor under running conditions is Inveresly proportional to supply voltage inversely proportional to rotor reactance at standstill None of the listed here Directly proportional to rotor resistance Inveresly proportional to supply voltage inversely proportional to rotor reactance at standstill None of the listed here Directly proportional to rotor resistance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the frequency of 3-phase supply to the stator of a 3-phase induction motor is increased, then synchronous speed ______ Is increased Is decreased None of the listed here Remains unchanged Is increased Is decreased None of the listed here Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
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