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Rectifiers and Converters

Rectifiers and Converters
Copper oxide rectifier is usually designed not to operate above

30°C
75°C
45°C
55°C

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Rectifiers and Converters
The applications of selenium rectifiers are usually limited to potential of

20 V
30 V
10 V
100 V

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

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

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Rectifiers and Converters
Ageing of a selenium rectifier may change the output voltage by

5 to 10 per cent
None of the listed here
15 to 20 per cent
25 to 30 per cent

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

Load
Zinc
Aluminium
Copper

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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
accelerates
any of the listed here
none of the listed here

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