Electrical Machines Compensating windings are used in DC generators mainly to reduce the eddy currents by providing local short circuit. to provide path for the circulation of cooling air. None of these to neutralize the cross magnetizing effect of the armature reaction. mainly to reduce the eddy currents by providing local short circuit. to provide path for the circulation of cooling air. None of these to neutralize the cross magnetizing effect of the armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Leading power factor. Lagging power factor. Zero power factor. Unity power factor. Leading power factor. Lagging power factor. Zero power factor. Unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction of an unsaturated DC machine is demagnetising. none of above. magnetising. crossmagnetising. demagnetising. none of above. magnetising. crossmagnetising. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating winding are used to rectify the flux density waveform at interpole region. throughout the air gap. region under main pole. None of these interpole region. throughout the air gap. region under main pole. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines High inrush of current during a starting of DC motor can efficiently be restricted to a safer value by increasing the _________________ resistance. none of above armature circuit shunt field both A and B none of above armature circuit shunt field both A and B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC series generator, the terminal voltage with increase in load will remain nearly constant increase to rated voltage and then may decrease increase gradually and then stay at rated voltage decrease remain nearly constant increase to rated voltage and then may decrease increase gradually and then stay at rated voltage decrease ANSWER DOWNLOAD EXAMIANS APP
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