Electrical Machines Field weakening control method is used for the _________ ? below rated speed above rated speed both A and B None of these below rated speed above rated speed both A and B None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following induction motor has the highest starting torque? Squirrel cage induction motor. Slip ring induction motor. None of these Same in both induction motors. Squirrel cage induction motor. Slip ring induction motor. None of these Same in both induction motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The functions of inter poles are None of these both 1 and 2 nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation None of these both 1 and 2 nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be 0.25. 0.72. 0.62. 1.24. 0.25. 0.72. 0.62. 1.24. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by f / s. sf / 2. sf. s2. f / s. sf / 2. sf. s2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following, voltage regulation may be zero or negative All of these leading power factor unity power factor lagging power factor All of these leading power factor unity power factor lagging power factor ANSWER DOWNLOAD EXAMIANS APP
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