Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.649. 0.443. 0.573. 0.512. 0.649. 0.443. 0.573. 0.512. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What type of dielectric material is used in capacitors used for fans and for power factor correction? Glass. Mica. Oil impregnated paper. Vacuum. Glass. Mica. Oil impregnated paper. Vacuum. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is 460 V. 230 V. 200 V. 115 V. 460 V. 230 V. 200 V. 115 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor the torque is proportional to 1/P² 1/P P² Power P 1/P² 1/P P² Power P ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor slots are slightly skewed in squirrel cage induction motor to increase the strength of rotor bars. decrease the amount of copper to be used. reduce the magnetic hum and locking tendency of rotor. provide ease of fabrication. increase the strength of rotor bars. decrease the amount of copper to be used. reduce the magnetic hum and locking tendency of rotor. provide ease of fabrication. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm? 24 5 10 12 24 5 10 12 ANSWER DOWNLOAD EXAMIANS APP
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