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Rectifiers and Converters

Rectifiers and Converters
Which of the following is reversible in action?

All of the listed here
Motor converter
Rotary converter
Motor generator set

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Rectifiers and Converters
In selenium rectifiers efficiencies ranging from ______ to ______ percent are attainable

20, 30
40, 50
75, 85
30, 60

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Rectifiers and Converters
Mercury, in arc rectifiers, is chosen for cathode because

Its boiling point and specific heat are low
Its ionization potential is relatively low
Its atomic weight is quite high
All of the listed here

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Rectifiers and Converters
The ignited or auxiliary anode in mercury arc rectifier is made of

Graphite
Copper
Boron carbide
Aluminium

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Rectifiers and Converters
The ionization potential of mercury is approximately

16.4 V
5.4 V
10.4 V
None of the listed here

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Rectifiers and Converters
The efficiency of an electrolytic rectifier is nearly

40 %
70 %
60 %
50 %

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