Rectifiers and Converters The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ? Both of the listed here They are mechanically strong They do not require any voltage for filament heating None of the listed here Both of the listed here They are mechanically strong They do not require any voltage for filament heating None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The metal rectifiers, as compared to mercury arc rectifiers give poor regulation can operate on high voltages operate on low temperatures can operate on heavy loads give poor regulation can operate on high voltages operate on low temperatures can operate on heavy loads ANSWER DOWNLOAD EXAMIANS APP
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-third of a cycle One-half a cycle One-fourth of a cycle Two-third of a cycle One-third of a cycle One-half a cycle ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters A synchronous converter can be started from D.C. side as D.C. motor by means of a small auxiliary motor from A.C. side as induction motor All of the listed here from D.C. side as D.C. motor by means of a small auxiliary motor from A.C. side as induction motor All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In selenium rectifiers efficiencies ranging from ______ to ______ percent are attainable 75, 85 20, 30 30, 60 40, 50 75, 85 20, 30 30, 60 40, 50 ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The ignited or auxiliary anode in mercury arc rectifier is made of Boron carbide Graphite Copper Aluminium Boron carbide Graphite Copper Aluminium ANSWER DOWNLOAD EXAMIANS APP
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