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Rectifiers and Converters

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

leakage reactance
resistance
all of the listed here
capacitance

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Rectifiers and Converters
The ionization potential of mercury is approximately

16.4 V
None of the listed here
10.4 V
5.4 V

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Rectifiers and Converters
A synchronous converter can be started

All of the listed here
by means of a small auxiliary motor
from D.C. side as D.C. motor
from A.C. side as induction motor

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

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

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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.

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

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

aluminium
copper
silver
graphite

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