Electrical Machines Which of the following methods of speed control is not affected through stator side? Change of number of pole. Change of supply frequency. Change of supply voltage. Change of rotor resistance. Change of number of pole. Change of supply frequency. Change of supply voltage. Change of rotor resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the full form of MNP? Magnetic field neutral pole. Magnetic neutral plane. Magnetic field neutral plane. Magnetic neutral pole. Magnetic field neutral pole. Magnetic neutral plane. Magnetic field neutral plane. Magnetic neutral pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is reduced, the power factor is unity power factor leading power factor lagging power factor None of these unity power factor leading power factor lagging power factor None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loop represents the area of eddy current loss hysteresis loss copper loss total iron losses eddy current loss hysteresis loss copper loss total iron losses ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dummy coils are used for mechanical balancing. All of these reducing armature reaction. increasing efficiency. mechanical balancing. All of these reducing armature reaction. increasing efficiency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as T ∝ P. T is independent of P. T2 ∝ P3. T ∝ √P. T ∝ P. T is independent of P. T2 ∝ P3. T ∝ √P. ANSWER DOWNLOAD EXAMIANS APP
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