A. 25, 35
B. 40, 50
C. 60, 70
D. 75, 85
A. an induction motor
B. a synchronous motor
C. a D.C. series motor
D. a D.C. shunt motor
A commutating rectifier consists of commutator driven by___________? Read More »
Rectifiers and Converters A. copper
B. aluminium
C. silver
D. graphite
E. tungsten
In a mercury arc rectifier, the anode is usually made of_____________? Read More »
Rectifiers and Converters A. Copper oxide rectifiers
B. Selenium rectifiers
C. Mercury arc rectifiers
D. Mechanical rectifiers
E. None of the above
A. Voltage drop in arc
B. Voltage drop at the anode
C. Voltage drop at the cathode
D. All of the above
Which of the following is the loss within the mercury arc rectifier chamber ? Read More »
Rectifiers and Converters A. Mechanical rectifiers
B. Copper oxide rectifiers
C. Selenium rectifiers
D. Electrolytic rectifiers
E. Mercury arc rectifiers
A. 80%
B. 70%
C. 60%
D. 40%
The efficiency of an electrolytic rectifier is nearly____________? Read More »
Rectifiers and Converters A. graphite
B. boron carbide
C. aluminium
D. copper
The ignited or auxiliary anode in mercury arc rectifier is made of____________? Read More »
Rectifiers and Converters