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Rectifiers and Converters

Rectifiers and Converters
The efficiency of the copper oxide rectifier seldom exceeds

85 to 90%
90 to 95%
65 to 75%
80 to 85%

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Rectifiers and Converters
The metal rectifiers, as compared to mercury arc rectifiers

give poor regulation
operate on low temperatures
can operate on heavy loads
can operate on high voltages

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

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

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

Zinc
Load
Aluminium
Copper

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Rectifiers and Converters
In a mercury pool rectifier, the voltage drop across its electrodes

varies exponentially with the load current
is directly proportional to load
is inversely proportional to load
is almost independent of load current

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Rectifiers and Converters
A rotary converter operates at a

high power factor
zero power factor
low power factor
None of the listed here

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