Alternators The slip rings emplyod in a 3-phase alternator in hydro station are insulated for Extra high tension voltage Low voltage Very low voltage Full armature voltage Extra high tension voltage Low voltage Very low voltage Full armature voltage ANSWER DOWNLOAD EXAMIANS APP
Alternators The speed of an alternator is changed from 3000 rpm to 1500 rpm. The generated emf/phase will become Half One fourth Double Unchanged Half One fourth Double Unchanged ANSWER DOWNLOAD EXAMIANS APP
Alternators The magnitude of emf generated by an alternators depends on ______ Number of poles Flux per pole All of the listed here Rotor speed Number of poles Flux per pole All of the listed here Rotor speed ANSWER DOWNLOAD EXAMIANS APP
Alternators In an alternator, the effect of armature reaction is minimum at power factor of ______ 0.866 leading 0.5 lagging Unity 0.866 lagging 0.866 leading 0.5 lagging Unity 0.866 lagging ANSWER DOWNLOAD EXAMIANS APP
Alternators Hydrogen is used in large alternators mainly to Reduce eddy current losses Cool the machine Strengthen the magnetic field Reduce distortion of waveform Reduce eddy current losses Cool the machine Strengthen the magnetic field Reduce distortion of waveform ANSWER DOWNLOAD EXAMIANS APP
Alternators Voltage drop in an alternator when under load is due to ______ Armature reactance Armatute reaction Armature resistance All of the listed here Armature reactance Armatute reaction Armature resistance All of the listed here ANSWER DOWNLOAD EXAMIANS APP
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