Rectifiers and Converters The internal efficiency of a mercury arc rectifier depends on voltage and current r.m.s. value of current voltage only current only voltage and current r.m.s. value of current voltage only current only 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 A rotary converter combines the function of None of the listed here an induction motor and a D.C. generator Both of the listed here a synchronous motor and a D.C. generator None of the listed here an induction motor and a D.C. generator Both of the listed here a synchronous motor and a D.C. generator ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply? Selenium rectifiers Electrolytic rectifiers Copper oxide rectifiers Mechanical rectifiers Selenium rectifiers Electrolytic rectifiers Copper oxide rectifiers Mechanical rectifiers ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The cathdde voltage drop, in a mercury arc rectifier, is due to expenditure of energy in liberating electrons from the mercury surface resistance expenditure of energy in overcoming the electrostatic field expenditure of energy in ionization expenditure of energy in liberating electrons from the mercury surface resistance expenditure of energy in overcoming the electrostatic field expenditure of energy in ionization ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The efficiency of the copper oxide rectifier seldom exceeds 85 to 90% 90 to 95% 80 to 85% 65 to 75% 85 to 90% 90 to 95% 80 to 85% 65 to 75% ANSWER DOWNLOAD EXAMIANS APP
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