Rectifiers and Converters To produce cathode spot in a mercury arc rectifier low mercury vapour pressures are used an auxiliary electrode is used anode is heated tube is evacuated low mercury vapour pressures are used an auxiliary electrode is used anode is heated tube is evacuated ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In phase-shift control method the control is carried out by varying the of grid voltage. magnitude polarity phase All of the listed here magnitude polarity phase All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The metal rectifiers, as compared to mercury arc rectifiers can operate on high voltages give poor regulation operate on low temperatures can operate on heavy loads can operate on high voltages give poor regulation operate on low temperatures can operate on heavy loads 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 Internal losses will be reduced The rectifier will not operate The rectifier will operate at reduced efficiency Both ion and electron streams will move in the same direction Internal losses will be reduced The rectifier will not operate The rectifier will operate at reduced efficiency ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The cathdde voltage drop, in a mercury arc rectifier, is due to expenditure of energy in overcoming the electrostatic field surface resistance expenditure of energy in ionization expenditure of energy in liberating electrons from the mercury expenditure of energy in overcoming the electrostatic field surface resistance expenditure of energy in ionization expenditure of energy in liberating electrons from the mercury ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In a rotary converter I2R losses as compared to a D.C. generator of the same size will be None of the listed here Less More Remain same None of the listed here Less More Remain same ANSWER DOWNLOAD EXAMIANS APP
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