To produce cathode spot in a mercury arc rectifier Options: A . &nbsptube is evacuated B . &nbspanode is heated C . &nbspan auxiliary electrode is used D . &nbsplow mercury vapour pressures are used

To produce cathode spot in a mercury arc rectifier

Question - To produce cathode spot in a mercury arc rectifier

Options:

A . tube is evacuated

B . anode is heated

C . an auxiliary electrode is used

D . low mercury vapour pressures are used

Answer: Option C

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