Rectifiers and Converters
The potential drop in the arc, in a mercury arc rectifier, varies

2 V to 3.5 V per cm length of the arc
0.5 V to 1.5 V per cm length of the arc
0.05 V to 0.2 V per cm length of the arc
none of the listed here

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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?

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

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