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 5 Hz 1.5 Hz 2.5 Hz 0.05 Hz 5 Hz 1.5 Hz 2.5 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor, the ratio of rotor cu loss and rotor input is given by 1/S S/1-S 1-S S 1/S S/1-S 1-S S ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The crawling in an induction motor is caused by High loads Harmonics developed in the rotor Low voltage supply Improper design of machine High loads Harmonics developed in the rotor Low voltage supply Improper design of machine ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel-cage induction motor can be controlled by all of the following except Reducing supply voltage Changing number of poles Changing winding resistance Changing supply frequency Reducing supply voltage Changing number of poles Changing winding resistance Changing supply frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors An induction motor with 1000 r.p.m. speed will have 2 poles 4 poles 8 poles 6 poles 2 poles 4 poles 8 poles 6 poles ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Less maintenance troubles are experienced in case of Both (A) and (B) None of these Slip ring induction motor Squirrel cage induction motor Both (A) and (B) None of these Slip ring induction motor Squirrel cage induction motor ANSWER DOWNLOAD EXAMIANS APP
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