Three Phase Induction Motors If an induction motor is running at slip S, then rotor output is ______ (1-S) × rotor input (1+S) × rotor input (S-1) × rotor input S × rotor input (1-S) × rotor input (1+S) × rotor input (S-1) × rotor input S × rotor input ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____ 300 rpm 1200 rpm 600 rpm 1000 rpm 300 rpm 1200 rpm 600 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The frame of an induction motor is usually made of Aluminium Bronze Cast iron Silicon steel Aluminium Bronze Cast iron Silicon steel ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A high starting torque can be obtained in a 3phase induction motor by _______ None of the listed here Decreasing rotor resistance Increasing rotor resistance Increasing rotor reactance None of the listed here Decreasing rotor resistance Increasing rotor resistance Increasing rotor reactance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The condition of induction motor at stand still resemble those of a transformer whose secondady is _______ Open circuited Supplying a variable resistive load None of the listed here Short circuited Open circuited Supplying a variable resistive load None of the listed here Short circuited 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 Changing number of poles Changing winding resistance Changing supply frequency Reducing supply voltage Changing number of poles Changing winding resistance Changing supply frequency Reducing supply voltage ANSWER DOWNLOAD EXAMIANS APP
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