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Rectifiers and Converters

Rectifiers and Converters
In a glass bulb mercury arc rectifier the maximum current rating is restricted to

2000 A
500 A
1500 A
200 A

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Rectifiers and Converters
Which of the following mercury arc rectifier will deliver least undulating current?

Six-phase
Three-phase
Two-phase
Single-phase

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Rectifiers and Converters
Which of the following AC. motors is usually used in large motor-generator sets?

Synchronous motor
Squirrel cage induction motor
Slip ring induction motor
Any of the listed here

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

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

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

colour of mercury
ionization
high temperature
electron streams

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Rectifiers and Converters
The ionization potential of mercury is approximately

None of the listed here
10.4 V
16.4 V
5.4 V

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