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RECTIFIERS AND CONVERTERS

Rectifiers and Converters
The voltage drop at anode, in a mercury arc rectifier is due to

energy spent in overcoming the electrostatic field
self restoring property of mercury
high temperature inside the rectifier
high ionization potential

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Rectifiers and Converters
Which of the following mercury arc rectifier will deliver least undulating current?

Three-phase
Single-phase
Two-phase
Six-phase

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Rectifiers and Converters
In a grid control of mercury arc rectifiers when the grid is made positive relative to cathode, then it the electrons on their may to anode.

decelerates
any of the listed here
none of the listed here
accelerates

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Rectifiers and Converters
Which of the following methods may be used to convert A.C. system to D.C.?

Rectifiers
Rotary converters
All of the listed here
Motor converters

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Rectifiers and Converters
With a motor converter it is possible to obtain D.C. voltage only upto

600-800 V
1000-1200 V
200-100 V
1700-2000 V

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