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Rectifiers and Converters

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

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

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Rectifiers and Converters
A rotary converter combines the function of

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

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

Graphite
Aluminium
Boron carbide
Copper

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

mercury pool
anode
cathode
shell bottom

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

resistance
capacitance
leakage reactance
all of the listed here

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Rectifiers and Converters
Mercury, in arc rectifiers, is chosen for cathode because

Its atomic weight is quite high
All of the listed here
Its ionization potential is relatively low
Its boiling point and specific heat are low

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