Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Leading power factor. Zero power factor. Lagging power factor. Unity power factor. Leading power factor. Zero power factor. Lagging power factor. Unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 3600 rpm. 4000 rpm. 3000 rpm. 1500 rpm. 3600 rpm. 4000 rpm. 3000 rpm. 1500 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Total core loss is also called as -------------? Hysteresis loss Magnetic loss Eddy current loss Copper loss Hysteresis loss Magnetic loss Eddy current loss Copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Inter pole winding is connected in-------------------------- ? series with main poles series with armature parallel with main poles parallel with armature series with main poles series with armature parallel with main poles parallel with armature ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is 25 Hz. 16.67 Hz. 60 Hz. 50 Hz. 25 Hz. 16.67 Hz. 60 Hz. 50 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For small value armature current Ia the torque developed by a DC series motor is proportional to Ia. 1/Ia. Ia2. √Ia. Ia. 1/Ia. Ia2. √Ia. ANSWER DOWNLOAD EXAMIANS APP
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