Electrical Machines A 3 - Φ, 6 pole, 50 Hz IM has a rotor speed of 987 rpm find rotor frequency? 0.65 Hz. 0.70 Hz. 0.75 Hz. 60 Hz. 0.65 Hz. 0.70 Hz. 0.75 Hz. 60 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a star - delta starting of an IM line voltage is 57.7 % of stator voltage. resistance is inserted in the rotor. reduced voltage is applied to the stator. applied voltage per stator phase is 57.7 % of a line volt line voltage is 57.7 % of stator voltage. resistance is inserted in the rotor. reduced voltage is applied to the stator. applied voltage per stator phase is 57.7 % of a line volt ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Interpoles in a DC motor must be Shunt excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformers operating in parallel will share the load depending upon their efficiency. leakage reactance. rating. percentage impedance. efficiency. leakage reactance. rating. percentage impedance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Zero power factor. Leading power factor. Lagging power factor. Unity power factor. Zero power factor. Leading power factor. Lagging power factor. Unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the residual magnetism is of the order of 10 %. 15 %. 2.5 %. 20 %. 10 %. 15 %. 2.5 %. 20 %. ANSWER DOWNLOAD EXAMIANS APP
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