Electrical Machines Demagnetization effects which of the following? both B and C reduction in main field flux commutation reduces the terminal voltage both B and C reduction in main field flux commutation reduces the terminal voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of a DC motor is laminated to reduce copper loss. eddy current loss. friction and windage loss. hysteresis loss. copper loss. eddy current loss. friction and windage loss. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator the actual flux distribution depends upon clearance between tips of the adjacent pole shoes. all of above. size of air gap. shape of the pole shoe. clearance between tips of the adjacent pole shoes. all of above. size of air gap. shape of the pole shoe. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages? Star side lags by -30°. Delta side lags by -30°. Star side leads by 30°. Delta side leads by 30°. Star side lags by -30°. Delta side lags by -30°. Star side leads by 30°. Delta side leads by 30°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A generator may loose residual magnetism due to heating. vibrations. over excitation. any of these. heating. vibrations. over excitation. any of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will not run. continue running in the same direction as before. run in a direction opposite to previous one. get damaged. not run. continue running in the same direction as before. run in a direction opposite to previous one. get damaged. ANSWER DOWNLOAD EXAMIANS APP
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