Rectifiers and Converters
Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply?

Electrolytic rectifiers
Copper oxide rectifiers
Mechanical rectifiers
Selenium rectifiers

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Rectifiers and Converters
On which of the following factors the number of phases for which a rectifier should be designed depends?

The voltage regulation of the rectifier should be low
The power factor of the system should be high
In the output circuit there should be no harmonics
All of the listed here

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