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Rectifiers and Converters

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

100 V
30 V
20 V
10 V

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

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

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Rectifiers and Converters
The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following

anode drop, cathode drop and arc drop
anode drop and cathode drop
cathode drop and arc drop
anode drop and arc drop

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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.

accelerates
none of the listed here
decelerates
any of the listed here

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Rectifiers and Converters
In a rotary converter I2R losses as compared to a D.C. generator of the same size will be

Less
Remain same
More
None of the listed here

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

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

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