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Rectifiers and Converters

Rectifiers and Converters
In a mercury arc rectifier, the anode is usually made of

copper
silver
aluminium
graphite

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Rectifiers and Converters
A mercury arc rectifier possesses ________ regulation characteristics

straight line
curved line
exponential
none of the listed here

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Rectifiers and Converters
A rotary converter combines the function of

Both of the listed here
None of the listed here
an induction motor and a D.C. generator
a synchronous motor and a D.C. generator

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

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

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Rectifiers and Converters
The efficiency of an electrolytic rectifier is nearly

60 %
70 %
50 %
40 %

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Rectifiers and Converters
When a rectifier is loaded which of the following voltage drops take place ?

Arc voltage drop
Voltage drop in resistance of transformer and smoothing chokes
All of the listed here
Voltage drop in transformer reactance

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