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Rectifiers and Converters

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

copper
graphite
silver
aluminium

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Rectifiers and Converters
The internal efficiency of a mercury arc rectifier depends on

current only
r.m.s. value of current
voltage and current
voltage only

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Rectifiers and Converters
In a mercury arc rectifier______ flow from anode to cathode

ions and electrons
ions
electrons
All of the listed here

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

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

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

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

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Rectifiers and Converters
The ignited or auxiliary anode in mercury arc rectifier is made of

Aluminium
Graphite
Copper
Boron carbide

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