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Rectifiers and Converters

Rectifiers and Converters
The efficiency of an electrolytic rectifier is nearly

60 %
70 %
40 %
50 %

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Rectifiers and Converters
Glass rectifiers are usually made into units capable of D.C. output (maximum continuous rating) of

500 A at 500 V
100 A at 100 V
300 A at 300 V
400 A at 400 V

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Rectifiers and Converters
Which of the following are the applications of D.C. system?

Battery charging work
Electrolytic and electro-chemical processes
All of the listed here
Arc welding

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Rectifiers and Converters
The potential drop in the arc, in a mercury arc rectifier, varies

0.5 V to 1.5 V per cm length of the arc
0.05 V to 0.2 V per cm length of the arc
2 V to 3.5 V per cm length of the arc
none of the listed here

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Rectifiers and Converters
In a mercury arc rectifier______ flow from anode to cathode

ions
electrons
ions and electrons
All of the listed here

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Rectifiers and Converters
In a single phase rotary converter the number of slip rings will be

Two
Three
Six
Four

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