Rectifiers and Converters In a three-phase mercury arc rectifiers each anode conducts for One-third of a cycle One-fourth of a cycle One-half a cycle Two-third of a cycle One-third of a cycle One-fourth of a cycle One-half a cycle Two-third of a cycle ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The efficiency of the copper oxide rectifier seldom exceeds 90 to 95% 80 to 85% 65 to 75% 85 to 90% 90 to 95% 80 to 85% 65 to 75% 85 to 90% ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In a rotary converter armature currents are None of the listed here partly a.c. and partly d.c. d.c. only a.c. only None of the listed here partly a.c. and partly d.c. d.c. only a.c. only ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The cathdde voltage drop, in a mercury arc rectifier, is due to expenditure of energy in liberating electrons from the mercury expenditure of energy in overcoming the electrostatic field expenditure of energy in ionization surface resistance expenditure of energy in liberating electrons from the mercury expenditure of energy in overcoming the electrostatic field expenditure of energy in ionization surface resistance ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In a rotary converter I2R losses as compared to a D.C. generator of the same size will be None of the listed here Remain same Less More None of the listed here Remain same Less More ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The applications of selenium rectifiers are usually limited to potential of 10 V 100 V 30 V 20 V 10 V 100 V 30 V 20 V ANSWER DOWNLOAD EXAMIANS APP
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