Rectifiers and Converters In a three-phase mercury arc rectifiers each anode conducts for One-third of a cycle Two-third of a cycle One-fourth of a cycle One-half a cycle One-third of a cycle Two-third of a cycle One-fourth of a cycle One-half a cycle ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters A rotary converter is a single machine with none of the listed here two armatures and one field one armature and one field one armature and two fields none of the listed here two armatures and one field one armature and one field one armature and two fields ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Ageing of a selenium rectifier may change the output voltage by 25 to 30 per cent 5 to 10 per cent 15 to 20 per cent None of the listed here 25 to 30 per cent 5 to 10 per cent 15 to 20 per cent None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In selenium rectifiers efficiencies ranging from ______ to ______ percent are attainable 40, 50 20, 30 30, 60 75, 85 40, 50 20, 30 30, 60 75, 85 ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In which of the following applications, direct current is absolutely essential ? Variable speed operation Traction Illumination Electrolysis Variable speed operation Traction Illumination Electrolysis ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In phase-shift control method the control is carried out by varying the of grid voltage. phase magnitude All of the listed here polarity phase magnitude All of the listed here polarity ANSWER DOWNLOAD EXAMIANS APP
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