Rectifiers and Converters Selenium rectifier can be operated at temperatures as high as 40°C 75°C 25°C 60°C 40°C 75°C 25°C 60°C ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In selenium rectifiers efficiencies ranging from ______ to ______ percent are attainable 20, 30 75, 85 40, 50 30, 60 20, 30 75, 85 40, 50 30, 60 ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Ageing of a selenium rectifier may change the output voltage by 15 to 20 per cent None of the listed here 5 to 10 per cent 25 to 30 per cent 15 to 20 per cent None of the listed here 5 to 10 per cent 25 to 30 per cent ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In a three-phase mercury arc rectifiers each anode conducts for One-half a cycle One-third of a cycle One-fourth of a cycle Two-third of a cycle One-half a cycle One-third of a cycle One-fourth of a cycle Two-third of a cycle ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters When a rectifier is loaded which of the following voltage drops take place ? Voltage drop in resistance of transformer and smoothing chokes All of the listed here Arc voltage drop Voltage drop in transformer reactance Voltage drop in resistance of transformer and smoothing chokes All of the listed here Arc voltage drop Voltage drop in transformer reactance ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters On which of the following factors the number of phases for which a rectifier should be designed depends? The voltage regulation of the rectifier should be low The power factor of the system should be high In the output circuit there should be no harmonics All of the listed here The voltage regulation of the rectifier should be low The power factor of the system should be high In the output circuit there should be no harmonics All of the listed here ANSWER DOWNLOAD EXAMIANS APP
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