Electrical Machines In a dc machine, the demagnetizing effect of armature reaction is due to non-sinusoidal nature of armature mmf magnetic saturation in half of the field pole uneven air-gap length component of armature mmf along field axis non-sinusoidal nature of armature mmf magnetic saturation in half of the field pole uneven air-gap length component of armature mmf along field axis ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an auto-transformer, power is transferred through conduction process only. None of these both A and B. induction process only. conduction process only. None of these both A and B. induction process only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 12 pole, 600 V, 50 Hz star connected IM has rotor resistance and stand still resistance of 0.03 Ω and 0.5 Ω respectively. The speed of maximum torque will be 470 rpm. 450 rpm. 240 rpm. 540 rpm. 470 rpm. 450 rpm. 240 rpm. 540 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing of DC generator means creation of residual magnetism by a DC source. None of these increasing flux density by providing extra ampere-turns in field. neutralization of residual magnetism. creation of residual magnetism by a DC source. None of these increasing flux density by providing extra ampere-turns in field. neutralization of residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The material used for commutator brushes is mostly carbon. mica. copper. cast iron. carbon. mica. copper. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In V/f speed control of 3-phase induction motor, with increase in frequency, the slip at which maximum torque occurs either of these. decrease. increase. None of these either of these. decrease. increase. None of these ANSWER DOWNLOAD EXAMIANS APP
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