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Rectifiers and Converters

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

cathode
mercury pool
anode
shell bottom

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

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

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Rectifiers and Converters
It is the_______of the transformer on which the magnitude of angle of overlap depends.

capacitance
all of the listed here
resistance
leakage reactance

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

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

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Rectifiers and Converters
In phase-shift control method the control is carried out by varying the of grid voltage.

phase
All of the listed here
polarity
magnitude

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

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

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