Electrical Machines In DC motors, under trailing pole tips, flux density will_______ ? increase either increase or decrease decrease None of these increase either increase or decrease decrease None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Satisfactory commutation of DC machine requires brushes should smoothly run in the holders. All of these brushes should be of proper grade and size. smooth, concentric commutator properly undercut. brushes should smoothly run in the holders. All of these brushes should be of proper grade and size. smooth, concentric commutator properly undercut. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following will vary the maximum torque? rotor reactance X both 1 and 2 None of these rotor resistance R rotor reactance X both 1 and 2 None of these rotor resistance R ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What does happen if tripled harmonics given to induction motor? Nothing will happen. Fail to start. Will results in short circuit. Will results in open circuit. Nothing will happen. Fail to start. Will results in short circuit. Will results in open circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 500 V, 120 KW, 50 Hz, star connected synchronous motor operating at 0.8 power factor leading has full load efficiency of 91%. The armature resistance is equal to 0.08Ω. The magnitude of armature current is nearly equal to 127 A. 240 A. 190 A. 173 A. 127 A. 240 A. 190 A. 173 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature core of a DC machine is laminated to minimise eddy-current loss hysteresis loss temperature rise mechanical loss eddy-current loss hysteresis loss temperature rise mechanical loss ANSWER DOWNLOAD EXAMIANS APP
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