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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.

capacitance
resistance
all of the listed here
leakage reactance

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Rectifiers and Converters
In a mercury arc rectifier characteristic blue luminosity is due to

ionization
colour of mercury
electron streams
high temperature

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

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

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Rectifiers and Converters
If cathode and anode connections in a mercury arc rectifier are inter changed

Internal losses will be reduced
Both ion and electron streams will move in the same direction
The rectifier will operate at reduced efficiency
The rectifier will not operate

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Rectifiers and Converters
Selenium rectifier can be operated at temperatures as high as

60°C
25°C
75°C
40°C

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Rectifiers and Converters
A commutating rectifier consists of commutator driven by

A D.C. series motor
An induction motor
A synchronous motor
A D.C. shunt motor

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