Rectifiers and Converters The efficiency of the copper oxide rectifier seldom exceeds 85 to 90% 90 to 95% 65 to 75% 80 to 85% 85 to 90% 90 to 95% 65 to 75% 80 to 85% ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In which of the following applications, direct current is absolutely essential ? Traction Variable speed operation Electrolysis Illumination Traction Variable speed operation Electrolysis Illumination ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The ionization potential of mercury is approximately None of the listed here 10.4 V 5.4 V 16.4 V None of the listed here 10.4 V 5.4 V 16.4 V ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters When a rectifier is loaded which of the following voltage drops take place ? Voltage drop in transformer reactance All of the listed here Voltage drop in resistance of transformer and smoothing chokes Arc voltage drop Voltage drop in transformer reactance All of the listed here Voltage drop in resistance of transformer and smoothing chokes Arc voltage drop ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters To produce cathode spot in a mercury arc rectifier an auxiliary electrode is used low mercury vapour pressures are used tube is evacuated anode is heated an auxiliary electrode is used low mercury vapour pressures are used tube is evacuated anode is heated ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The applications of selenium rectifiers are usually limited to potential of 20 V 30 V 10 V 100 V 20 V 30 V 10 V 100 V ANSWER DOWNLOAD EXAMIANS APP
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