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RECTIFIERS AND CONVERTERS

Rectifiers and Converters
In a mercury arc rectifier, the anode is usually made of

copper
silver
aluminium
graphite

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Rectifiers and Converters
Which of the following metals is generally manufactured by electrolysis process?

Zinc
Aluminium
Copper
Load

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Rectifiers and Converters
If cathode and anode connections in a mercury arc rectifier are inter changed

The rectifier will operate at reduced efficiency
Internal losses will be reduced
The rectifier will not operate
Both ion and electron streams will move in the same direction

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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

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Rectifiers and Converters
A synchronous converter can be started

by means of a small auxiliary motor
from D.C. side as D.C. motor
from A.C. side as induction motor
All of the listed here

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