The potential drop in the arc, in a mercury arc rectifier, varies_____________?
(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
The potential drop in the arc, in a mercury arc rectifier, varies_____________?
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