Rectifiers and Converters To produce cathode spot in a mercury arc rectifier 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 an auxiliary electrode is used ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ? Both of the listed here They do not require any voltage for filament heating None of the listed here They are mechanically strong Both of the listed here They do not require any voltage for filament heating None of the listed here They are mechanically strong ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In a phase-shift control method, the phase shift between anode and grid voltages can be achieved by means of Shunt motor Synchronous generator Induction regulator Synchronous motor Shunt motor Synchronous generator Induction regulator Synchronous motor ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In a mercury arc rectifier characteristic blue luminosity is due to electron streams ionization colour of mercury high temperature electron streams ionization colour of mercury high temperature ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Which of the following methods may be used to convert A.C. system to D.C.? Rotary converters Rectifiers Motor converters All of the listed here Rotary converters Rectifiers Motor converters All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Which of the following mercury arc rectifier will deliver least undulating current? Three-phase Six-phase Two-phase Single-phase Three-phase Six-phase Two-phase Single-phase ANSWER DOWNLOAD EXAMIANS APP
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