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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.

resistance
leakage reactance
all of the listed here
capacitance

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Rectifiers and Converters
Which of the following is the loss within the mercury arc rectifier chamber?

Voltage drop in arc
All of the listed here
Voltage drop at the cathode
Voltage drop at the anode

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

2000 A
200 A
1500 A
500 A

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Rectifiers and Converters
Ageing of a selenium rectifier may change the output voltage by

25 to 30 per cent
None of the listed here
5 to 10 per cent
15 to 20 per cent

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Rectifiers and Converters
Which of the following are the applications of D.C. system?

Battery charging work
Arc welding
All of the listed here
Electrolytic and electro-chemical processes

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Rectifiers and Converters
Which of the following methods may be used to convert A.C. system to D.C.?

All of the listed here
Motor converters
Rotary converters
Rectifiers

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