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Rectifiers and Converters

Rectifiers and Converters
With a motor converter it is possible to obtain D.C. voltage only upto

1000-1200 V
1700-2000 V
200-100 V
600-800 V

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Rectifiers and Converters
The applications of selenium rectifiers are usually limited to potential of

10 V
30 V
20 V
100 V

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Rectifiers and Converters
In a rotary converter I2R losses as compared to a D.C. generator of the same size will be

Less
More
None of the listed here
Remain same

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

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

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Rectifiers and Converters
A synchronous converter can be started

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

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

cathode
mercury pool
anode
shell bottom

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