Electrical Machines Semi closed slots or totally closed slots are used in induction motors, essentially to improve starting torque reduce magnetising current and improve power factor increase pull out torque decrease starting torque improve starting torque reduce magnetising current and improve power factor increase pull out torque decrease starting torque ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an induction machine is run at above the synchronous speed it acts as None of these a synchronous motor an induction generator an induction motor None of these a synchronous motor an induction generator an induction motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors uses slip rings? Both Synchronous and Induction motor Synchronous motors DC Shunt Motor Induction motors Both Synchronous and Induction motor Synchronous motors DC Shunt Motor Induction motors ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor slots are slightly skewed in squirrel cage induction motor to increase the strength of rotor bars. provide ease of fabrication. reduce the magnetic hum and locking tendency of rotor. decrease the amount of copper to be used. increase the strength of rotor bars. provide ease of fabrication. reduce the magnetic hum and locking tendency of rotor. decrease the amount of copper to be used. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 57.1%. 48.0%. 59.2%. 88.8%. 57.1%. 48.0%. 59.2%. 88.8%. ANSWER DOWNLOAD EXAMIANS APP
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