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Rectifiers and Converters

Rectifiers and Converters
The efficiency of an electrolytic rectifier is nearly

60 %
70 %
40 %
50 %

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Rectifiers and Converters
In which of the following equipment direct current is needed?

Relay
Time switches
All of the listed here
Telephones

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

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

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Rectifiers and Converters
The ionization potential of mercury is approximately

10.4 V
5.4 V
None of the listed here
16.4 V

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Rectifiers and Converters
Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required?

Motor converter
Mercury arc rectifier
Rotary converter
Motor-generator set

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Rectifiers and Converters
In a mercury arc rectifier positive ions are attracted towards

mercury pool
shell bottom
anode
cathode

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