Rectifiers and Converters In a three-phase mercury arc rectifiers each anode conducts for 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 One-half a cycle One-third of a cycle ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The internal efficiency of a mercury arc rectifier depends on voltage and current voltage only current only r.m.s. value of current voltage and current voltage only current only r.m.s. value of current ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The voltage drop at anode, in a mercury arc rectifier is due to high temperature inside the rectifier energy spent in overcoming the electrostatic field self restoring property of mercury high ionization potential high temperature inside the rectifier energy spent in overcoming the electrostatic field self restoring property of mercury high ionization potential ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The efficiency of the copper oxide rectifier seldom exceeds 90 to 95% 65 to 75% 85 to 90% 80 to 85% 90 to 95% 65 to 75% 85 to 90% 80 to 85% ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters A commutating rectifier consists of commutator driven by A D.C. shunt motor A synchronous motor A D.C. series motor An induction motor A D.C. shunt motor A synchronous motor A D.C. series motor An induction motor ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters If cathode and anode connections in a mercury arc rectifier are inter changed Both ion and electron streams will move in the same direction The rectifier will operate at reduced efficiency Internal losses will be reduced The rectifier will not operate Both ion and electron streams will move in the same direction The rectifier will operate at reduced efficiency Internal losses will be reduced The rectifier will not operate ANSWER DOWNLOAD EXAMIANS APP
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