Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? GNA MNA either GNA or MNA None of these GNA MNA either GNA or MNA None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ? 1 and 3 2 alone 1 and 2 1, 2 and 3 1 and 3 2 alone 1 and 2 1, 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ induction motor none of them. power factor at starting in the same as that while running. power factor at starting is high as compared to that while running. power factor at starting is low as compared to that while running. none of them. power factor at starting in the same as that while running. power factor at starting is high as compared to that while running. power factor at starting is low as compared to that while running. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of rotation of 5th harmonic component in the stator of an induction motor is 0.5 times the synchronous speed. (1 / 5) times the synchronous speed. 5 times the synchronous speed. (1 / 15) times the synchronous speed. 0.5 times the synchronous speed. (1 / 5) times the synchronous speed. 5 times the synchronous speed. (1 / 15) times the synchronous speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in DC generators will result in reduction in generated emf. open circuit. short circuit. increase in slip. reduction in generated emf. open circuit. short circuit. increase in slip. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking is employed to brake reversing drive non reversing drive both 1 and 2 None of these reversing drive non reversing drive both 1 and 2 None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS