The potential drop in the arc, in a mercury arc rectifier, varies_____________?
Correct answer: C. 2 V to 3.5 V per cm length of the arc
- A. 0.05 V to 0.2 V per cm length of the arc
- B. 0.5 V to 1.5 V per cm length of the arc
- C. 2 V to 3.5 V per cm length of the arc
- D. none of the above
Explanation
The arc voltage gradient in a mercury arc rectifier is comparatively high, typically about 2 to 3.5 V per centimetre of arc length. The lower ranges are more characteristic of ordinary conductive voltage drops, not the mercury arc.
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